Filed by:   Quest Diagnostics Incorporated

                       This communication is filed pursuant to Rules 165 and 425
                       promulgated under the Securities Act of 1933, as amended.

                                          Subject Company:    Unilab Corporation
                                               Commission File No.:      0-22758



FORWARD-LOOKING STATEMENTS:

This communication contains certain forward-looking statements under the Private
Securities Litigation Reform Act of 1995. These forward-looking statements,
which may include, but are not limited to, statements concerning the financial
condition, results of operations and businesses of Quest Diagnostics and Unilab
and the benefits expected to result from the contemplated transaction, are based
on management's current expectations and estimates and involve risks and
uncertainties that could cause actual results or outcomes to differ materially
from those contemplated by the forward-looking statements.

Factors that could cause or contribute to such differences may include, but are
not limited to, the risk that the conditions relating to the required minimum
tender of Unilab shares or regulatory clearance might not be satisfied in a
timely manner or at all, risks relating to the integration of the technologies
and businesses of Quest Diagnostics and Unilab, unanticipated expenditures,
changing relationships with customers, suppliers and strategic partners,
conditions of the economy and other factors described in the most recent reports
on Form 10-Q, most recent reports on Form 10-K and other periodic reports filed
by Quest Diagnostics and Unilab with the Securities and Exchange Commission.

ADDITIONAL INFORMATION:

Quest Diagnostics intends to file a Registration Statement on Form S-4 and a
Schedule TO, and Unilab plans to file a Solicitation/Recommendation Statement on
Schedule 14D-9, with the Securities and Exchange Commission in connection with
the transaction. Quest Diagnostics and Unilab expect to mail a Prospectus, which
is part of the Registration Statement on Form S-4, the
Solicitation/Recommendation Statement on Schedule 14D-9 and related exchange
offer materials, including a letter of election and transmittal, to stockholders
of Unilab upon commencement of the exchange offer.

In addition, Quest Diagnostics intends to file a Statement on Schedule 13D
relating to its agreement with Kelso Investment Associates VI, L.P. and KEP VI,
LLC. Investors and stockholders of Unilab are urged to read all of these
documents carefully when they are available. These documents contain important
information about the transaction and should be read before any decision is made
with respect to the exchange offer. Investors and stockholders will be able to
obtain free copies of these documents through the website maintained by the
Securities and Exchange Commission at www.sec.gov. Free copies of these
documents may also




be obtained from Quest Diagnostics, by directing a request to
Quest Diagnostics Incorporated at 1 Malcolm Avenue, Teterboro, NJ 07608, or from
Unilab, by directing a request to Unilab Corporation at 18448 Oxnard Street,
Tarzana, CA 91356.

In addition to the Registration Statement on Form S-4, Schedule TO, Prospectus,
Solicitation/Recommendation Statement on Schedule 14D-9 and related exchange
offer materials, both Quest Diagnostics and Unilab file annual, quarterly and
special reports, proxy Statements and other information with the Securities and
Exchange Commission. You may read and copy any reports, Statements or other
information filed by Quest Diagnostics or Unilab at the SEC public reference
room at 450 Fifth Street, N.W., Washington, D.C. 20549 or at any of the
Securities and Exchange Commission's other public reference rooms in New York,
New York and Chicago, Illinois. Please call the Securities and Exchange
Commission at 800-SEC-0330 for further information on the public reference
rooms. Quest Diagnostics' and Unilab's filings with the Securities and Exchange
Commission are also available to the public from commercial document-retrieval
services and at the website maintained by the Securities and Exchange Commission
at www.sec.gov.





The following is a transcript of a conference call with investors:
                             QUEST DIAGNOSTICS INCORPORATED

                                  April 2, 2002
                                  8:00 a.m. CST

Coordinator              Welcome to the Quest Diagnostics Investor conference
                         call. At the request of the company, this call is being
                         recorded. During our Q&A session, callers are limited
                         to one question per turn. The entire contents of this
                         call, including the presentation and question and
                         answer session that will follow, are the copyrighted
                         property of Quest Diagnostics with all rights reserved.
                         Any redistribution, retransmission or rebroadcast of
                         this call in any form without the express written
                         consent of Quest Diagnostics is strictly prohibited.
                         Now I would like to introduce Cathy Doherty, Vice
                         President of Communications and Public Affairs for
                         Quest Diagnostics. Go ahead, please.

C. Doherty               Thank you for joining us. I am here with Ken Freeman,
                         Chairman and Chief Executive Officer of Quest
                         Diagnostics. We are also joined by Bob Hagemann, our
                         Chief Financial Officer; Bob Whalen, Unilab's CEO,
                         joins us by telephone from California. Ken Freeman will
                         make a few brief remarks on our news so that we can get
                         right to your questions.

                         We are currently in a quiet period and will not be
                         commenting today on financial results for the first
                         quarter until we release earnings on April 18th. At
                         that time, we will also provide updated guidance. Some
                         of our commentary and answers to questions may contain
                         forward-looking statements that are based on current
                         expectations. Actual results could be materially
                         different from our expectations due to factors that are
                         detailed in our year 2001 10-K and subsequent filings,
                         as well as from unanticipated events. Now here is Ken
                         Freeman.

  K. Freeman             Thank you, Cathy. Early this morning we took another
                         exciting step to accelerate profitable growth by
                         announcing a definitive agreement to acquire Unilab
                         Corporation in a transaction valued at $1.1 billion,
                         including about $200 million in Unilab debt. This
                         acquisition will establish Quest Diagnostics as the
                         leading provider of diagnostic testing in California,
                         the nation's largest market. Customers will see
                         expanded access to laboratory testing services and
                         greater convenience with one-stop shopping for all of
                         their diagnostic testing needs. Further strengthening
                         our distribution network will make us an even more
                         attractive partner with diagnostic discovery companies.
                         And we will add seasoned management talent to our team.
                         The terms are summarized in this morning's press
                         release and we will be filing the merger agreement
                         today as part of a Form 8-K. So I'd like to spend the
                         next few minutes





                         sharing my enthusiasm about this transaction and how we
                         expect it to benefit our employees, our customers and
                         our shareholders.

                         The benefits to our customers are compelling. Combining
                         our two companies will significantly enhance customer
                         service in California. Customers will access diagnostic
                         testing services through a combined network of about 50
                         rapid-response laboratories and 500 conveniently
                         located patient service centers, by far, the largest in
                         the state. This combination will give Unilab customers
                         access to innovative technologies and an expanded
                         esoteric testing menu from our Nichols Institute based
                         in San Juan Capistrano.

                         Customers will also have available direct
                         physician-to-physician consultations with the
                         industry's most extensive network of medical and
                         scientific specialists. Additionally, physician and
                         hospital customers will benefit from our
                         state-of-the-art electronic connectivity services.

                         The transaction creates value for Quest Diagnostics
                         shareholders as well. Unilab meets our three ground
                         rules for acquisitions: full compliance with the law,
                         well managed and accretive to earnings per share during
                         the first year.

                         Unilab has a strong regulatory compliance program that
                         is very similar to our own. In addition, Unilab is well
                         managed, with profitability levels among the highest in
                         the industry. Assuming a late second quarter close, the
                         transaction will be modestly accretive to earnings
                         during 2002; approximately $0.02 to $0.03 per share
                         before an anticipated pre-tax charge related to the
                         transaction of up to $20 million, most of which will be
                         cash costs. We anticipate significant synergies,
                         approximately $30 million on an annualized basis,
                         following the completion of the integration within two
                         years after the closing. We see the biggest
                         opportunities for synergies in eliminating duplicate
                         infrastructure, internalizing esoteric testing and
                         reducing bad debt.

                         This morning, Standard & Poor's reaffirmed our rating
                         of BBB- with a positive outlook and we expect Moody's
                         will also, at a minimum, reaffirm our rating and
                         outlook. Now I'd like to introduce Bob Whalen, who will
                         share his perspective on our news.

B. Whalen                Thank you, Ken. Joining together with Quest Diagnostics
                         is great for Unilab shareholders. Unilab investors will
                         now have the opportunity to become shareholders in the
                         premier laboratory company in our industry, a company
                         with tremendous growth opportunities and a strong track
                         record for creating shareholder value. In addition,
                         Unilab shareholders will have





                         the opportunity to share in the value created by
                         combining our two companies.

                         Our customers in California will benefit considerably
                         from expanded access to lab services throughout the
                         state. More importantly in my view, they will now have
                         direct access to Nichols Institute, Quest Diagnostics'
                         world-renowned esoteric testing laboratory and research
                         and development center. Physicians and hospital
                         customers will be able to consult with nearly 300 MDs
                         and PhDs, the most extensive network of medical and
                         scientific specialists in the industry.

                         Personally, I am thrilled to be joining a company
                         focused on quality with strong vision and values; and I
                         am excited about leading the combined local operation
                         in California, a market I am very familiar with. I have
                         led successful integrations before and look forward to
                         creating benefits for our customers and enhanced value
                         for our shareholders.

K. Freeman               Thank you, Bob. As you know, we've demonstrated our
                         ability to effectively integrate acquired companies and
                         so has Unilab. I'm very pleased that Bob will lead the
                         integration of our California operations and be
                         responsible for our local California business. Bob is a
                         seasoned laboratory industry executive with a strong
                         track record of results during his more than 30-year
                         career. We will also use the proven integration
                         approach that has served us so very well through
                         previous acquisitions.

                         In this case, while detailed integration planning has
                         not yet started, our strategy anticipates closing
                         certain facilities to rationalize capacity in
                         California. As a result, some positions will be
                         eliminated over time, which we expect to address
                         primarily through normal, voluntary attrition as we've
                         done in past integrations. Also, as in the past, we
                         will treat all employees with fairness, dignity and
                         respect, consistent with our values.

                         Our growth initiatives, focused on Six Sigma quality,
                         genomics and customer connectivity, coupled with
                         selective acquisitions, are building on a strong
                         foundation to deliver sustainable, long-term profitable
                         growth. Our strategic growth plan uniquely positions
                         Quest Diagnostics by broadening our geographic
                         presence, expanding our access and distribution
                         network, enhancing customer service to meet the special
                         needs of hospital and esoteric testing customers and
                         accelerating the development of innovative new tests
                         and technologies.

                         Putting it all together, we remain committed to our
                         financial goals: achieving sustainable, double-digit
                         revenue growth; EBITDA margins in excess of 20% and
                         continuing to deliver earnings per share growth of at
                         least 30%. The acquisitions of AML and Unilab provide a
                         clear path to





                         deliver in excess of 30% earnings per share growth this
                         year and next. They also provide additional fuel as we
                         drive to deliver outstanding returns for our
                         shareholders well into the future. We're excited about
                         the opportunities this transaction creates. Now, let's
                         open up the call for your questions. Operator?

Coordinator              Our first question comes from David Lewis. Sir, you're
                         online.

D. Lewis                 Good morning guys, congratulations. A couple quick
                         questions. Could you give a little more granularity,
                         Ken, perhaps, on your plans on internalizing any
                         esoteric tests that Unilab outsources; secondarily,
                         maybe any large managed care contracts in the State of
                         California that you think are particularly meaningful;
                         and lastly, any concerns given the now very large share
                         the number one and number two players in California
                         will now have in terms of anti-trust or HSR clearance?

K. Freeman               You've given me three in one here, David.  I'll do my
                         best to get at them. The first one, as it relates to
                         esoteric testing and in bringing the esoteric testing
                         in house that's currently sent out by Unilab, we will
                         move with deliberate speed over time to bring the
                         esoteric testing send outs in house to Nichols
                         Institute. This certainly represents one of the synergy
                         opportunities from the transaction.

                         In terms of managed care relationships, as you know, we
                         don't comment on specific relationships with specific
                         customers. As we've demonstrated in the past, certainly
                         as we move forward, we would expect to use appropriate
                         discipline ensuring that we're appropriately
                         compensated for the services we provide. Unilab does
                         have a much broader payer mix than exists in many other
                         markets around the US and, again, we don't typically
                         disclose specific customer information. Their largest
                         customer accounts for less than 5% of revenues.

                         In terms of the market itself in California,
                         approximately $3.8 billion of lab testing is performed
                         in California today. The market seems to be growing at
                         rates higher than the general US marketplace, which, as
                         you'll recall, is growing at 5% to 7% per year; Unilab
                         has about 10% of the market today. On a combined basis,
                         our market share will be approximately 12% of the
                         market in California, which is consistent with our
                         overall market share across the United States.
                         California is a very competitive marketplace today; it
                         will remain very competitive after this acquisition is
                         completed. There are other very large providers in the
                         state from a hospital and insurance standpoint, as well
                         as about 600 smaller independent clinical laboratories
                         competing in California.





Coordinator              Thank you. Again, all callers are limited to one
                         question per turn please. We now have our next
                         question from Kathleen Lamb from Credit Suisse First
                         Boston.

K. Lamb                  Good morning and congratulations. I have one quick
                         question. In the refinancing comment in the press
                         release, does that contemplate tendering for the Unilab
                         debt?

R. Hagemann              Certainly that's something that we're going to
                         consider. We'll be evaluating the economics attached
                         to that.

K. Lamb                  Are there any provisions in the indentures of those
                         bonds that would require it; or is it just a matter of
                         looking at the interest rate on those bonds?--

R. Hagemann              We'll be looking at the interest rates.
                         Those bondholders have the right to put the debt to us
                         upon the completion, but it's at a very modest premium
                         of 101%.

K. Lamb                  Correct.  Thank you.

Coordinator              We now have a question from David Zimbalist from Morgan
                         Stanley.

D. Zimbalist             Hello. I was wondering if you could comment a little
                         bit about the Arizona operations of Unilab and to what
                         extent that would have to be integrated with Sonora
                         Quest.

K. Freeman               I'll take that one, thank you. In the State of Arizona,
                         if you're familiar with what we did when we acquired
                         SBCL, we are required through our joint venture to
                         offer business operations that might exist in Arizona
                         to our partner, to our joint venture called Synora
                         Quest Laboratories. We will be doing that in accordance
                         with the terms of our relationship in Arizona. It's
                         important to keep in mind that the Arizona operations
                         of Unilab today are very small, very small indeed.

D. Zimbalist             Can you give us some quantification of that?

K. Freeman               Bob Whalen, would you please help us out on that?

B. Whalen                At the moment, it's about $3 million a year.

Coordinator              I'm sorry, are you ready for the next question?

K. Freeman               Yes.





Coordinator              Thank you.  We now have a question from Robert
                         Willoughby from Credit Suisse First Boston.

R. Willoughby            Thank you. Ken, can you remind us what you folks are
                         tying senior management's incentive compensation to and
                         based on the consolidation challenges you have in
                         front, is there any thought of changing any of these
                         metrics that you might be compensating senior
                         management on?

K. Freeman               Yes, Rob. What we do in terms of compensation in
                         general for our senior management across Quest
                         Diagnostics is drive a very significant process that
                         relates to earnings per share growth in addition to a
                         balanced score card. But the vast majority of the
                         compensation is driven by delivering earnings per share
                         growth. In terms of Bob's contract itself, Bob has
                         agreed to stay on with us; we're very thrilled about
                         that, through an employment agreement that we've
                         executed along with many of the members of his senior
                         management team. Their compensation is tied very, very
                         specifically, to achieving the financial goals that
                         we've set in place together in the State of California.

Coordinator              We now have a question from Drew Figdor from Tiedemann.

D. Figdor                Just two questions. In terms of timing, it's an
                         exchange offer; or when do you plan on launching it and
                         what do you need to close it because you say late
                         second quarter. Is there any particular reason why it
                         should take more than 45 days? Is that because you
                         might anticipate a second request from the government
                         on the anti-trust? The Kelso, did they say if they're
                         going to elect stock or cash?

K. Freeman               You asked us a bunch of questions. Let me take a crack
                         at some of them. I may need some help from my partners
                         here. We would expect to launch the cash election
                         exchange offer during the month of May. We'll be filing
                         our Hart Scott Rodino during the month of April. You
                         know it's a two-step process to include, after the cash
                         election exchange offer, the stock for stock merger.
                         And as time goes on, we would expect that all of those
                         activities will be complete by the end of the second
                         quarter. As we look at the transaction itself, you can
                         expect that we will be very much coordinating dialogues
                         with the folks at the FTC. We do not anticipate any
                         specific issues whatsoever; however, we will be working
                         in concert with them after the HSR filings have been
                         submitted.

D. Figdor                And then Kelso, when you say that they're tendering
                         into it, did they say to you if they want stock or
                         cash?

K. Freeman               Kelso, at this point in time, has not made a specific
                         commitment. They will be, through public filings, doing
                         an indication at the right moment.





R. Hagemann              And they had the same rights as everyone else in the
                         exchange offer in their ability to elect stock or cash.

D. Figdor                Okay, thank you very much.

Coordinator              We now have a question from Bill Bonello, US BancCorp
                         Piper Jaffrey.

B. Bonello               Could you just comment real briefly on how this
                         impacts, particularly in '03, your 30% EPS growth
                         targets? Is this above and beyond that or was this type
                         of acquisition contemplated in your suggestion that you
                         could grow 30%?

K. Freeman               Bill, I'm going to have to give you qualification, as I
                         begin this reminding you and everyone that we're right
                         now in a quiet period, so we're not in a position to
                         formally adjust guidance on this call. As you know,
                         however, we do see accretion in the year 2003 of $0.18
                         to $0.20 per share, the combined accretion from AML and
                         Unilab. We are very comfortable with the prior guidance
                         we've given you that says that our earnings per share
                         would be at least 30% higher than the prior year. We're
                         fully committed to deliver on that commitment for '02
                         and '03 and certainly, the acquisitions of both Unilab
                         and AML will provide additional fuel to achieve those
                         earnings objectives.

B. Binello               Thank you.

Coordinator              Our next question comes from Sandy Draper from Sun
                         Trust Robinson Humphrey.

S. Draper                This may be mostly a question for Bob and maybe a
                         little bit of a tough one. It doesn't seem like there
                         was that much of a premium paid. Obviously, from the
                         IPO, the stock is up and there's a good return there.
                         But for current shareholders looking at it, what was
                         the motivation for selling when there wasn't that
                         significant a premium to the current valuation in the
                         stock market?

K. Freeman               Bob Whalen, do you want to take that please?

B. Whalen                Sure. I think from the Unilab Board's perspective the
                         critical question was not calculating a one week or a
                         one day premium, but rather what provides the highest
                         value for our shareholders. Suffice it to say, you can
                         be very comfortable that the Board looked at all
                         available alternatives and that would be other
                         purchasers, going it alone; we looked at the future of
                         the business, both within California, our ability to
                         grow within the state, our ability to expand into
                         such states as Arizona; and we looked at other




                         potential opportunities outside the state. At the end
                         of the day, we felt that this benefited our
                         shareholders the best from all the various alternatives
                         that were out there.

                         It allows those shareholders in Unilab today, if they
                         choose to, to cash out their investment, or if they
                         still like the industry, they can now own stock in the
                         best, strongest laboratory company in the United
                         States. We felt at the end of the day that the fixed
                         ratio structure that allows Unilab shareholders to
                         benefit from the upside of the transaction as well as
                         the future growth of Quest Diagnostics stock, which has
                         also been a great performer, and, as I said, if the
                         shareholders want to convert to cash, they can and if
                         not, they have the option of retaining the Quest stock.

S. Draper                Great, thank you.

Coordinator              Our next question comes from Benner Ulrich from UBS
                         Warburg. You're online.

R. Goldwasser            Hello, this is actually Ricki Goldwasser. Can you
                         remind us what percent of Unilab revenues are coming
                         from hospitals and what percent is currently capitated
                         and what is currently fee for service?

K. Freeman               Bob, would you like to take that?

B. Whalen                I will say we have very little business from hospitals.
                         I think this is one of the real opportunities for us is
                         to be able to now sell the Nichols Institute Quest
                         Diagnostics Reference Laboratory work directly to our
                         potential clients. We have a very large base of
                         business in Northern California, but very few
                         hospitals. I think this is a real opportunity for us in
                         the longer term to extend and expand our hospital
                         revenue. But right now our hospital revenue is less
                         than probably 2% or 3%. Cathy, do you want to give them
                         the breakdown on the other fee?-

C. Doherty               --Sure. Ricki, in terms of managed care capitated
                         revenue as a percentage of total revenue from Unilab;
                         it's about 10% to 15%. As far as third party fee for
                         service and again, this is revenue, it's about 30% to
                         35%.

R. Hagemann              Keep in mind, in Unilab's 10-K, which was recently
                         filed, there is payer mix information in there that
                         breaks out revenues and volumes.

R. Goldwasser            Given the environment in California, do you see any
                         opportunities in further shifting from the 10% to 15%
                         capitated towards fee for service?

K. Freeman               Ricki, as we look at the marketplace in California, we
                         see the very same trends that have been occurring in
                         other parts of the country beginning to





                         take hold in California as well, which indeed is a
                         beginning of a shift from capitation to fee for service
                         plans.

B. Whalen                I think I just might add, Ken, that I've been talking
                         about this on our conference calls and in our investor
                         conferences a lot and I really do echo what Ken says, I
                         really believe that the trend is underway. If you look
                         nationwide, the Los Angeles Times published an article
                         back about a month ago that said for the first time,
                         HMO enrollment declined to 48% in 2001 from 55% in 2000
                         and this was a study that Kaiser did. I don't think
                         there's any question that that trend is continuing.

R. Goldwasser            Thank you.

Coordinator              Again, all callers are limited to one question per turn
                         please. We now have a question from Tom Gallucci from
                         Merrill Lynch.

T. Gallucci              As a follow up to that question, clearly, Unilab has
                         very strong margins. Can you talk about it maybe part
                         of that is due to the concentration of the business,
                         but can you maybe just talk about the pricing
                         environment in California versus the rest of the
                         country and how that impacts it? Also, how bad debt
                         expense plays into the equation?

K. Freeman               Tom, certainly, the California market is highly
                         competitive. The industry is highly competitive with
                         numerous independent labs and hospital based
                         competitors, so the marketplace in California is, I'd
                         say, as competitive as any other marketplace in the
                         United States, no more, no less. As we've done,
                         certainly, in the past, together on a combined basis,
                         we would expect to exert appropriate discipline in
                         pricing, which, certainly, we at Quest Diagnostics have
                         been doing for many years and our understanding is that
                         Unilab has also been engaging in a similar process of
                         engaging in discipline and weeding out poor performing
                         accounts over the past several years as well based on
                         our due diligence efforts.

R. Hagemann              Tom, Unilab's bad debt is just over 7% or so. As you
                         know, our's is around 6% and we have a long-term target
                         of driving that towards 4%. Their DSOs are in the mid
                         60's range; our DSOs are in the low 50's. We look at
                         both the bad debt and DSOs as opportunities. We believe
                         that the bad debt is a synergy opportunity and driving
                         down the DSOs is a cash flow opportunity for us.

T. Gallucci              Thank you.

Coordinator              We now have a question from Mark Ort from Glazer
                         Capital.





M. Ort                   Hello. You mentioned earlier that you have 12% of the
                         combined market share in California. Is that including
                         hospitals and if not, what would be your market share
                         combined of the independent facilities?

K. Freeman               This includes the relevant market, which is all
                         providers of laboratory testing. It's really the only
                         way to look at this industry because we are both
                         providers and competitors of hospitals in marketplaces
                         across the United States, so the $3.8 billion market
                         that we're talking about is hospitals as well as
                         physician owned or physician office laboratories as
                         well as the more than 600 independent clinical
                         laboratories in the state.

M. Ort                   Can you break out the numbers for the independents
                         though?  Do you have that number?

C. Doherty               About 55% of that market is hospital driven with about
                         30% coming from independent clinical labs, the rest
                         coming from physician office labs.

M. Ort                   So it's probably about 25% of the market share from
                         looking at only the independents.

K. Freeman               You're in the ballpark.

M. Ort                   How does that stack up against your primary competitor,
                         LabCorp.?

K. Freeman               We don't tend to do a lot of dialogue about specific
                         market shares of various companies in various
                         marketplaces. What I would say, however, again, is that
                         in the State of California, it's an intensely
                         competitive marketplace like every other marketplace in
                         this country. The relevant market to consider is who
                         we're going up against every single day and competing
                         for business, which is hospitals, physician office labs
                         and physician owned labs, as well as other independent
                         clinical laboratories.

M. Ort                   Okay, thank you.

Coordinator              Our next question comes from Andrea Bosse from Salomon
                         Smith Barney. Ma'am, you're online. I'm sorry, we'll go
                         to the next question and that is from Jeremy Carton
                         from HBV Capital.

J. Carton                Hello. If we elect 100% stock as consideration, will it
                         be subject to proration?

K. Freeman               If the overall transaction goes beyond 30% election of
                         cash, there will then be proration to a maximum of
                         30% cash consideration in terms of the entire
                         transaction.





J. Carton                Thank you.

Coordinator              We now have a question from John Hess from Bank One
                         Investments.

C. Haff                  It's Charles Haff, Bank One. In the spirit of full
                         disclosure, assuming that Unilab's advisors talked to
                         Quest Diagnostics before the IPO ten months ago, I was
                         wondering if you could characterize discussions that
                         you had at that time about possibly acquiring Unilab
                         and then maybe from Unilab's perspective now, why is
                         the time now for doing this deal versus ten months ago?

K. Freeman               Any dialogue in terms of historical discussions between
                         the two companies will be documented fully in
                         subsequent filings and you'll be able to find that
                         information there.

C. Haff                  Could we get the spirit of Unilab's Board's thoughts
                         on?

B. Whalen                Sure. I think it goes back to what I said earlier as it
                         related to premium. We sat down and we looked at all of
                         the alternatives available to us, which was to go it
                         alone and what would that mean, what are our growth
                         opportunities in the state, what are our growth
                         opportunities outside the state. For example, we had a
                         very high level of interest in AML. Tim Brodnick and I
                         are good friends. We had talked back and forth along
                         the line; our board members had conversations with AML.
                         So when a property like that goes off the market that
                         limits one of our options. We just felt at the end of
                         the day and we feel very, very strongly about this that
                         this was a good deal at this point in time for our
                         shareholders.

C. Haff                  Thank you.

Coordinator              We now have a question from Kemp Dolliver from SG Cowen
                         Securities.

K. Dolliver              Thank you. Given that you're announcing this
                         acquisition within roughly a day of closing the AML
                         purchase, are we to expect that in the third quarter
                         you will announce something else? Essentially, what's
                         your appetite for additional acquisitions this year?
                         Thank you.

K. Freeman               Thanks for that question, Kemp. I guess what I'd say to
                         you here is crystal clear. As you know, we as a company
                         are very deliberate in how we run our business. We go
                         with deliberate speed, but we're also very
                         opportunistic. As we look at these two transactions,
                         one that closed yesterday and the one we're announcing
                         today, the acquisition of Unilab, certainly, what we're
                         doing here is driving a conscious effort to continue
                         the transformation and our leadership as Quest
                         Diagnostics in our space.





                         We purposely wanted to put these transactions together.
                         One way to put it is that we put the West as becoming
                         part of Quest. We're dramatically improving our
                         position in two very rapidly growing states in the
                         Western United States. Nevada is the most rapidly
                         growing state in the Union on a percentage term basis.
                         California is the most rapidly growing state in the
                         United States in terms of shear numbers of people
                         increased to the population rolls each year.

                         The SBCL integration is behind us; we're working on our
                         standardization and six-sigma efforts and they're
                         moving full speed ahead and we feel, certainly, we can
                         handle these two acquisitions coincidentally,
                         simultaneously. But I'd like you to keep in mind also
                         the limited geographic impact of these transactions.
                         Let me stress that we're only really integrating
                         operations in California and Virginia, in terms of lab
                         capacity. We cover geographic markets throughout the
                         country, so while these transactions are transforming
                         the company with esoteric testing growth and furthering
                         our relationships with hospitals, as well as the
                         geographic reach on the West Coast, this is not as
                         pervasive a combination of transactions as SBCL was two
                         and one-half short years ago.

                         Getting back to the yes or no - will you do another
                         major acquisition? As always, we're going to be
                         deliberate as we proceed. It's always possible that a
                         unique opportunity could come along that we might
                         consider, but we would, in all instances, need to be
                         comfortable with the pace of integrations underway. If
                         you look at our tradition, Kemp, you know us well;
                         we're very disciplined in such things. We won't bite
                         off more than we can chew.

K. Dolliver              Great, thank you.

Coordinator              We now have a follow up question from Tom Gallucci from
                         Merrill Lynch.

A. Rice                  It's actually AJ Rice. Hello, Ken and everyone else.
                         Just a question about the integration of operations.
                         Obviously in the SmithKline merger, there was both
                         routine and esoteric. Here, one of the opportunities
                         is to shift that esoteric business over time over to
                         Nichols Institute. Can you just give us the flavor for
                         the logistic challenges of doing that versus routine
                         business? Is it materially different? What are some of
                         the things that you think about when you're trying to
                         shift esoteric business like that?

K. Freeman               Certainly. First an overview, AJ, just to put the
                         overall perspective on it for you. Fundamentally,
                         remember with AML, what we are in large part putting in
                         place is an East Coast esoteric testing capability in
                         their facility in Chantilly, Virginia. We will be the
                         only major laboratory provider that





                         has an East Coast and a West Coast esoteric testing
                         presence, East Coast and West Coast. At the very same
                         time, what that will imply is that over time, there
                         will be some business that's performed at Nichols
                         Institute that we will relocate to the East Coast, to
                         Chantilly, Virginia. That will free up capacity at
                         Nichols Institute to bring in additional testing from
                         the West into that facility.

                         Certainly, as is the case with any redirection of
                         specimens, we will be going one customer at a time,
                         step by step, inch by inch in deliberately in sourcing
                         the testing at the Nichols Institute and over time,
                         also, redirecting specimens that are traditionally
                         coming from the East Coast to the West Coast for
                         Nichols back to the East. Again, we have our ground
                         rules, and our first one is the customer has to be
                         served without disruptions and we'll do this with
                         deliberate speed, step by step, inch by inch. The
                         initial feedback from our customers, in terms of the
                         AML announcement as it relates to having an East Coast
                         esoteric testing presence, has been very, very
                         encouraging.

                         As we move forward, we think that this value
                         proposition will be profound. One other way to put it
                         in perspective for you, AJ, on the broader sense is the
                         fact that unlike SBCL where we went from 40 to 30 major
                         laboratories around the United States and impacted
                         every single geographic market, in this case, in terms
                         of laboratory consolidations and rationalization, we're
                         only impacting two markets: the metro DC market as well
                         as California. In addition, the only place where there
                         will be lab consolidations is California; that's it,
                         that state only. Our most profitable markets across the
                         United States, which tend to be from Boston all the way
                         through the Rocky Mountains, the northern part of the
                         United States, will not be impacted by what we're
                         doing.

                         We'll be moving about 5% to 10% of the specimens our
                         total company will process as a result of this
                         integration over the next two years compared to about
                         25% of the specimens that were redirected only two
                         short years ago, during the last two years, through the
                         SBCL integration. So putting it altogether,
                         integrations are challenging, but we believe if you
                         take the combination of the Unilab activities,
                         including internalization of test send outs as well as
                         the AML integration, we believe our proven capabilities
                         that we demonstrated with SBCL will serve us well as we
                         move forward.

A. Rice                  Okay, thank you.

Coordinator              Our next question comes from Andrew Bhak from Goldman
                         Sachs. Sir, you're online.





A. Bhak                  Good morning, congratulations. As we look out over the
                         next three to five years, in terms of future
                         acquisition strategy, I guess we're following on two
                         transactions, each with its own unique features, but
                         that have built out certain capacity, what you might
                         call infrastructure capacity on the East Coast, or in
                         building out presence in California. As you look out
                         strategically with the existing portfolio of assets
                         that the company has today? Are there any other obvious
                         areas of incremental acquisition activity, whether it's
                         infrastructure platform or geographic market focus, or
                         is it really kind of a selective and targeted strategy
                         going forward?

K. Freeman               We have been, I would have to say, fairly targeted and
                         selective in the past as well and you can expect that
                         to continue as we move forward. We will continue to use
                         our ground rules, which say that companies have to
                         comply with the law, be well managed and also be
                         accretive for shareholders in the first year. The
                         industry itself does remain highly fragmented, so we do
                         anticipate over time there will be potential
                         opportunities for growth in various geographic areas.
                         In addition, we see opportunities potentially over time
                         in the areas of genomic and esoteric testing moving
                         forward. Finally, also, much like our MedPlus
                         acquisition of last year, we do see potential
                         opportunities moving forward to further broaden our
                         industry leading line of connectivity options for our
                         customers.

A. Bhak                  So when it comes to these types of transactions, aside
                         from your very tight acquisition criteria, does it
                         essentially come down to a make versus buy as you think
                         about the company strategically? Either the costs and
                         the resources to build out that capacity internally
                         versus there's a platform, it meets your very strict
                         acquisition criteria, you can do it and obviously, with
                         SBCL you've proven your ability to integrate. Is that
                         the decision filter that you think about?

K. Freeman               I think that's an excellent description of part of how
                         we drive forward. Absolutely. In addition, of course,
                         deliberate speed is very important as well as we
                         analyze opportunities.

A. Bhak                  Okay, great, thank you very much.

Coordinator              We now have a question from Henry Reukauf from Deutsch
                         Bank.

H. Reukauf               Actually, my question was answered. Thank you very
                         much.

Coordinator              Thank you, Sir. Then our next question is from Ron
                         Speaker from Janus.

R. Speaker               Could you just quickly go through your anticipated
                         leverage changes in your EBITDA, interest coverage and
                         debt levels?





R. Hagemann              If you were to look at our leverage on a pro forma
                         basis for year-end 2001, you would see that our debt to
                         capital would be in about the 48% range, which is up
                         about 10 points or so from where we were. You should
                         expect, though, that as the year progresses, that's
                         going to improve because we'll be paying down debt with
                         the cash flow generated from the transactions. But most
                         importantly, what you need to keep in mind is that both
                         rating agencies have reaffirmed their credit rating, at
                         least, S&P has come out. We anticipate that Moody's
                         will do the same thing, come out and reaffirm for us
                         both the credit rating and the outlook.

R. Speaker               So how much additional leverage did this put on
                         the...enterprise?--

R. Hagemann              --... we anticipate between both the AML transaction
                         and the Unilab transaction, there will be almost $1
                         billion in additional debt that will be added. Again,
                         we'll be paying that down rather rapidly with the
                         strong cash from operations that we generate.

R. Speaker               And is that why you did the one-year term loan instead
                         of a longer agreement?

R. Hagemann              At this point, we have a bridge loan in place to close
                         the Unilab transaction into and then we'll be
                         evaluating more permanent financing and you should
                         expect that it'll be a combination, most likely, of
                         bank and public debt. The financing for the AML
                         transaction is being completed out of existing
                         facilities that we have: an AR revolver and a revolving
                         credit facility with our banks.

R. Speaker               Thank you.

Coordinator              Our next question comes from Fred Weiss from Atlantic
                         Trust Pell Rudman.

F. Weiss                 Congratulations. My questions have been answered. Thank
                         you.

Coordinator              Thank you, sir. Then our next one is from Nick Ciocci
                         from MRT Capital.

N. Ciocci                Good morning. Could you just go over the merger
                         consideration again? What happens if all shareholders
                         elect stock? Will they be forced to be prorated to
                         guarantee 30% being paid in cash?

R. Hagemann              No, the 30% is a maximum. If all shareholders were to
                         elect stock, we would issue stock to all of them.





N. Ciocci                Okay, thank you.

Coordinator              We now have a question from Angela Samfilippo from US
                         Bank Corp/Piper Jaffrey.

A. Samfilippo            Good morning. Could you tell me what's assumed in the
                         $30 million of synergies?

K. Freeman               In terms of the synergies from Unilab, we have
                         indicated $30 million of synergies by the end of the
                         year 2004. The key areas of synergy include lab
                         capacity rationalization, the internalization of
                         esoteric testing send outs into Quest Diagnostics,
                         specifically to Nichols Institute, reduction of bad
                         debt, as well as various infrastructure savings as well
                         including purchasing savings, elimination of duplicate
                         infrastructure in terms of staffing, logistics and what
                         have you. We're not in a position today to share
                         specifics by category. I would highlight for you that
                         in the year 2002, 2003 and 2004, I'll give you some
                         numbers. By the end of the year 2004, the combination
                         of AML and Unilab will realize $45 million of synergies
                         for Quest Diagnostics' shareholders. In the year 2002,
                         we expect $5 to $8 million of synergies on a combined
                         basis from both companies, AML and Unilab. In the year
                         2003, from the combined companies of AML and Unilab, we
                         expect to realize $30 million to $35 million of
                         synergies and essentially complete the integration of
                         AML. In the year 2004 then, we'll get to the full $45
                         million commitment.

A. Samfillipo            Thank you.

Coordinator              We now have a question from Nick Graziano from March
                         Partners.

N. Graziano              Thank you. I just wanted to clarify two items in the
                         press release. First, if we do elect a combination of
                         cash and stock, if there is any fixed election there;
                         if there's any fixed combination of the two? Secondly,
                         it says that under the agreement with Kelso that they
                         will sell their shares to Quest if the merger agreement
                         is terminated. If you could just share any of the terms
                         around that. Thank you.

R. Hagemann              With respect to the first question around cash and
                         stock, again, each holder of a Unilab share has the
                         right to receive as compensation for their Unilab
                         share, either 100% in Quest Diagnostic stock or 100%
                         in cash, and then the total aggregate cash
                         consideration would be cut back to 30% if, in total,
                         the shareholders had elected to receive in excess of
                         30%.

N. Graziano             Can you elect to receive a combination of the two,
                         50/50 for instance?

R. Hagemann              Yes, you can.





Coordinator              Our next question comes from Christian Correa from
                         Lehman Brothers.

C. Correa                Hello. I was wondering if you could tell us a little
                         bit about the American Lab acquisition and how the
                         anti-trust review went in that situation.

K. Freeman               Certainly. We closed the transaction with AML
                         yesterday, as you know, and the anti-trust review was
                         very typical under the circumstances. So we went
                         through the process, had excellent dialogue with the
                         Justice Department as they went through the appropriate
                         analysis and we're now moving forward, as you know.

C. Career                Thank you.

Coordinator              Our next question comes from David Zimbalist from
                         Morgan Stanley.

D. Zimbalist             Hello. Just a follow-up. First of all, could you give
                         us a percentage of revenues for Unilab from test send
                         outs and also talk a little bit about the structure,
                         the way you're managing regionally? It sounds like
                         California will be run by Unilab's current management
                         and Nevada would be run by AML, a little bit more about
                         how you see post integration structure at Quest.

K. Freeman               I'll take the second part of the question as it relates
                         to the management approach as it relates to how we
                         intend to run the two companies joining the fold.
                         Certainly, in the State of California, as we put our
                         existing business together with that of Unilab and we
                         evaluate the capabilities and the prospects in that
                         state, we think we have an ideal opportunity to take
                         the best of management from both companies, which is
                         our tradition and what we would fully intend to do
                         under all circumstances. The nuance in California is
                         the fact that we've asked Bob Whalen -- and he's agreed
                         and we're thrilled about it -- to lead the overall
                         local operations of California in conjunction with our
                         senior leaders and other senior leaders from Unilab. As
                         we drive the integration planning process, we'll be
                         putting in place and finalizing the appropriate
                         management structure. Just as you saw with SBCL, you're
                         going to see the best of both companies come together
                         to lead the combined enterprise.

                         Bob Whalen brings tremendous strength and tradition
                         into the responsibility; we're thrilled that Bob's
                         going to be leading the charge with us and our team's
                         thrilled too overall in terms of the management team in
                         California to be part of the overall process of driving
                         the business forward. Again, very consistent with what
                         we've done in the past, what we did with the SBCL
                         acquisition where we joined the two companies





                         together and had representatives of management meld
                         together in senior leadership positions across the
                         United States in various geographies.

                         As it relates to AML, in the case of AML, what we're
                         doing is we're bringing the hospital business and the
                         esoteric testing business together in one joint
                         organization. The leadership of AML is intact as we
                         drive forward. We do expect over time to continue to
                         evolve the management structure, but once again, it's
                         the best of both companies as we drive what's right for
                         our customers and what's right for our employees and,
                         of course, what's right for our shareholders.

R. Hagemann              David, with respect to your second question about the
                         outsourcing, if you look in Unilab's 10-K, they
                         disclose that approximately 5% of the revenues is
                         associated with outsourcing test send outs, including
                         anatomic pathology that's sent out.

D. Zimbalist             In terms of the bridge loan?

R. Hagemann              The bridge loan is a one-year facility that's in place.
                         It has interest rates very consistent with the rates on
                         our existing credit facilities and we expect to
                         refinance it shortly after the transaction closes. It's
                         a committed financing at this point.

D. Zimbalist             Thank you.

Coordinator              We now have a question from Matt Gotlin from
                         Chesapeake Partners.

M. Gotlin                Hello, congratulations. Could you give a little more
                         detail on the background of the transaction and then
                         who are the investment bankers on the transaction? You
                         said earlier you were going to launch the tender in
                         May; did I hear that correctly? Or will the tender be
                         closing in May towards the end of the quarter?

K. Freeman               The tender will launch in May. In terms of the dialogue
                         between the parties, the intense discussions began at
                         the beginning of the year and have continued since to
                         this moment, to this day. You'll see all the details in
                         subsequent filings in terms of the gives and the takes
                         of the dialogue during that period of time.

M. Gotlin                Who are the investment bankers, the firms?

R. Hagemann              For us it was Merrill Lynch.

B. Whalen                For Unilab it was Salomon Smith Barney and Credit
                         Suisse.





M. Gotlin                Thank you and congratulations.

Coordinator              We now have a question from Adam Jiwan from Soros
                         Management.

J. Gillory               Hello. It's John Gillory; most of my questions have
                         been answered. Maybe you could confirm that the
                         exchange ratio is a fixed ratio. Is there any
                         subsequent pricing period or any collar?

R. Hagemann              No, it's a fixed ratio with no collar.

J. Gillory               Thank you.

Coordinator              I'm sorry, Sir, has your question been answered?

J. Gillory               Yes.





Coordinator              Thank you very much. We now have a follow up question
                         from Drew Figdor from Tiedemann.

D. Figdor                My question has been answered, thank you.

Coordinator              Thank you, Sir. We now have a question from Mike
                         Shannon from Westchester Capital Management.

R. Barron                This is Roy Barron; I work with Mike Shannon. He's had
                         to step out for a second. With regard to the 30% cash
                         consideration, am I to understand that that's 30% of
                         the total consideration paid in the deal? That the
                         number of shares that we'll receive, 26.50 goes down as
                         DGX goes down?

R. Hagemann              It's 30% of the total valuation of the Unilab equity is
                         capped at 30% in cash and should folks elect more than
                         30%, they would be cut back to that 30% level. A
                         maximum of $295 million in cash that will be
                         distributed to the Unilab shareholders.

R. Barron                So no matter where DGX is, Unilab holders can opt for
                         26.50 and receive 30% in cash.

R. Hagemann              Yes.

R. Barron                Great, thank you very much.

Coordinator              We now have a question from Joe Gozzi from Alpine
                         Associates.

J. Gosey                 My question has been answered. Thank you.




Coordinator              Thank you, Sir. Our next question is from Matthew Buten
                         from Argus Partners.

M. Buten                 A quick housekeeping question. Amortization and
                         goodwill, are you going to be adding goodwill to the
                         balance sheet and how much would be the annual
                         amortization amount?

R. Hagemann              Between both the AML acquisition and the Unilab
                         acquisition, we'll be adding approximately $1.4 billion
                         to $1.5 billion in goodwill. The vast majority of the
                         purchase price is being allocated to goodwill and
                         there'll be no amortization attached to that in
                         accordance with the new accounting rules.

M. Buten                 Thank you and congratulations.

Coordinator              We now have a question from Craig Nandey from Shore
                         Water Ltd.

C. Nandey                Good morning, gentlemen, thank you. Just a very quick
                         question. How far along are you on your due diligence
                         and when do you anticipate completing it if you haven't
                         already? Thank you.

K. Freeman               Due diligence was completed in advance of the
                         transaction.

C. Nandey                Thank you.

Coordinator              Thank you for participating in the Quest Diagnostics
                         investor conference call. Investors in the United
                         States may listen to a replay of this call by dialing
                         800-925-2388. Again, that number is 800-925-2388. The
                         replay will be open at 11:00 a.m. Eastern time and will
                         continue until 5:00 p.m. on May 17th. Investors outside
                         the United States may dial 402-220-4111. Again, that
                         number is 402-220-4111. No password is required for
                         either number. In addition, registered analysts may
                         access an online replay of the call through Street
                         Events at www.streetevents.com. The call will also be
                         available to the media and individual investors at
                         www.questdiagnostics.com. The online replay will be
                         available 24 hours a day beginning at noon. Thank you
                         very much and good-bye.