Document:

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                                                                   EXHIBIT 10.16

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR CERTAIN REDACTED PROVISIONS OF
THIS AGREEMENT. THE REDACTED PROVISIONS ARE IDENTIFIED BY THREE ASTERISKS
ENCLOSED BY BRACKETS AND UNDERLINED. THE CONFIDENTIAL PORTION HAS BEEN FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.

                               SERVICES AGREEMENT

                  This agreement ("Agreement"), is made and entered into as of
the lst day of February, 1998 by and between VHA Inc., a Delaware corporation
("VHA"), and Specialty Laboratories, Inc., a California corporation ("Vendor").

                             PRELIMINARY STATEMENTS:

                  A. VHA is, among other things, in the business of providing
purchasing opportunities with respect to high quality products and services to
certain health care providers who have appointed VHA as their agent ("VHA
Members and Affiliates") or have appointed HealthCare Purchasing Partners, Inc.,
as their agent ("HPPI Members"), a current list of which has been provided to
Vendor by VHA;

                  B. Vendor is, among other things, the provider of the services
listed on Exhibit A ("Services"); and

                  C. Vendor and VHA desire to make the Services available for
purchase by VHA Members and Affiliates and HPPI Members from Vendor pursuant to
this Agreement;

                  In consideration of the premises, the representations and
warranties of the parties, and other good and valuable consideration, the
adequacy, receipt and sufficiency of which are acknowledged, the parties agree,
subject to the conditions, terms and provisions of this Agreement, as follows:

     SECTION 1.   OFFER, SALE AND PRICES.

                  During the term and for the duration of this Agreement, Vendor
agrees to offer to sell and to sell the Services to VHA Members and Affiliates
or HPPI Members at prices [***]*. Vendor agrees to provide written notice to VHA
of all price offers at price [***]*. Vendor agrees that the prices, quality and
value of these Services shall remain market competitive at all times during the
terms of this Agreement.

                  Vendor shall not offer to VHA Members and Affiliates or HPPI
Members other services and/or products in conjunction with the Services covered
by this Agreement under terms and conditions such that VHA Members and
Affiliates or HPPI Members have no real economic choice except to purchase
Services with such other services and/or products on a bundled basis, without
the prior written notice to VHA.

     SECTION 2.   PROMPT PERFORMANCE.

                  Vendor agrees to promptly perform Services ordered under this
Agreement by the VHA Members and Affiliates or HPPI Members in accordance with
any schedule agreed to between Vendor and the VHA Member or Affiliate or HPPI
Member.

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     SECTION 3.   BILLING BY AND PAYMENT TO VENDOR.

                  Vendor agrees to direct its invoices for Services ordered
under this Agreement to the VHA Members and Affiliates or HPPI Members. Payment
terms shall be Net 30 days. A [***]* late payment charge will be added for VHA
Members and Affiliates and HPPI Members whose accounts payable to Vendor are 60
days or more. However, Vendor and any VHA Member and Affiliate or HPPI Member
may mutually agree to other payment terms.

     SECTION 4.   TERM AND TERMINATION.

                  This Agreement shall commence on February 1, 1998 and shall
continue until December 31, 2000. This agreement may be renewed to continue
until terminated by the mutual agreement of the parties provided written notice
is signed by both parties at least sixty (60) days prior to December 31, 2000.
In addition, this Agreement may be terminated by either party at any time, at
will, and without cause upon not less than sixty (60) days prior written notice
to the other party.

     SECTION 5.   PERFORMANCE REVIEW.

                  The parties agree to meet, at the request of either party, no
less frequently than once in any one hundred-eighty day (180) period during the
term of this Agreement to discuss the performance under this Agreement.

     SECTION 6.   COMPLIANCE WITH LAWS.

                  Vendor represents, warrants and guarantees that all Services
performed under this Agreement are, as of the date of such performance, in
compliance with all federal, state and local laws, statutes, ordinances, rules,
regulations and orders.

     SECTION 7.   BOOKS AND RECORDS, AUDIT.

                  Vendor agrees to keep, maintain and preserve complete, current
and accurate books, records and accounts of the transactions contemplated by
this Agreement and such additional books, records and accounts as are necessary
to establish and verify Vendor's compliance under this Agreement. All such
books, records and accounts shall be available for inspection and audit by VHA
and its authorized representatives at any time during the term of this Agreement
and for two (2) years thereafter, but no more frequently than twice in any
consecutive twelve (12) month period and only during reasonable business hours
and upon reasonable notice. The exercise by VHA of the right to inspect and
audit is without prejudice to any other or additional rights or remedies of
either party.

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EXCHANGE COMMISSION.

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     SECTION 8.   INDEMNITY AND INSURANCE.

                  Vendor agrees to protect, defend, indemnify and to hold VHA,
VHA Members and Affiliates and HPPI Members and their respective subsidiaries,
affiliates, directors, officers and employees ("Indemnitees") harmless from any
loss, liability, damage, cost or expense (including attorneys' fees and other
expenses of litigation) because of (i) personal/bodily injury, including death
at any time resulting therefrom, or damage to property, including loss of use
thereof and downtime, caused by any Service, act or omission by Vendor, or any
of its employees, agents, or subcontractors or (ii) any material
misrepresentation, breach of warranty or covenant or other breach or default by
Vendor under this Agreement; provided, however, that Vendor shall not be
obligated under this Agreement to defend, indemnify or hold harmless any
Indemnitee from any such loss, liability, damage, cost or expense which results
solely from that Indemnitee's misconduct or negligence. Without limiting the
generality of the preceding sentence, Vendor agrees to obtain and maintain, at
its own expense, commercial general liability insurance including blanket
contractual liability coverage with minimum limits of $2,000,000 per occurrence
and $5,000,000 annual aggregate. Such insurance shall include all Indemnitees as
additional insureds. Within thirty (30) days from the date of this Agreement,
Vendor shall submit to VHA a certificate of insurance attested by a duly
authorized representative of the insurance carrier or carriers, evidencing that
the insurance required is in force and in effect and that such insurance will
not be canceled or materially changed without giving VHA at least thirty (30)
days prior written notice.

                  Furthermore, Vendor shall defend, indemnify and hold harmless
Indemnitees from and against any liability, damage, cost or expense arising out
of any claim of patent, trademark or copyright infringement made with respect to
any Service.

     SECTION 9.   DELETION.

                  Notwithstanding anything to the contrary contained in this
Agreement, VHA may delete any one or more of the Services from this Agreement at
any time, at will and without cause upon not less than sixty (60) days prior
written notice to Vendor.

     SECTION 10.  INDEPENDENT CONTRACTOR.

                  None of the provisions of this Agreement is intended to
create, nor shall any provision in this Agreement be deemed or construed to
create, any relationship between Vendor and VHA other than that of independent
entities contracting with each other under this Agreement solely for the purpose
of effecting the provisions of this Agreement. Neither of the parties, nor any
of their employees, shall be construed to be the agent, the employer or
representative of the other.

     SECTION 11.  MARKETING FEE.

                  Within thirty (30) days after the end of each full or partial
month during the term of the Agreement, Vendor will pay VHA a marketing fee
equal to [***]* of all net sales (as

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EXCHANGE COMMISSION.

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defined in this paragraph of Services pursuant to the Agreement during such
month. The term "net sales" means the price of each Service (determined in
accordance with the Agreement) delivered to each VHA Member and Affiliate less
the aggregate of credits and refunds allowed or paid VHA Members and Affiliates
under the Agreement; provided, however, that a refund paid shall be subtracted
to the extent representing a credit previously allowed. The term "all net sales"
means the sum of net sales.

     SECTION 12.  MONTHLY REPORT.

                          With each payment of a marketing fee, Vendor will
deliver to VHA a report ("Monthly Report"), in form and substance reasonably
satisfactory to VHA, which sets forth accurately:

                           (a)      the name of Vendor, the month and year to
which the Monthly Report (and the enclosed marketing fee) relates and the
contract number (as provided Vendor by VHA),

                           (b)      with respect to each VHA Member and
Affiliate (described by LIC number, full name, city, state and zip code as
provided Vendor by VHA), the sum of net sales and the associated marketing fees
for all Services sold to each such VHA Member and Affiliate during such month,

                           (c)      the sum of the net sales and the associated
marketing fees for all Services provided to all VHA Members and Affiliates
during such month,

                           (d)      the calculation used by Vendor to determine
the marketing fee, and

                           (e)      such additional information as VHA may
reasonably request from time to time.

                  Monthly reports shall be delivered, with the marketing fee
enclosed, to:

                                   VHA Inc.
                                   220 East Las Colinas Boulevard
                                   Irving, TX  75039-5500
                                   (Mailing Address:  P.O. Box 140909
                                                      Irving, TX  75014-0909)
                                   Attn:  Accounts Receivable

     SECTION 13.  REPORTING AND PAYMENT PENALTIES.

                  In the event Vendor fails to pay the marketing fee in
accordance with Section 12 and/or fails to provide the reports described in
Section 13 within the time and manner stated, VHA may invoice Vendor for the
marketing fees estimated by VHA to be due, payable within ten (10) days of the
date of such invoice. Invoice by VHA or payment by Vendor shall not relieve
Vendor of its payment obligations under Section 12 or the reporting obligations
of Section 13. In addition, upon the occasion of the first failure to receive a
payment or report when due, Vendor shall receive a written warning. Upon the
second and any subsequent failure

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to provide payment or a report when due, Vendor shall pay an administrative
penalty in accordance with the following schedule:

                          2nd Failure - [***]*
                          3rd Failure - [***]*
                          4th Failure - [***]*
                          5th Failure - [***]*
                          6th Failure - [***]*

     SECTION 14.  HEALTH CARE PROVIDER CONSIDERATION.

                  Vendor agrees to provide notice and give equal consideration
to VHA Members and Affiliates for the delivery of health care services to
Vendor's employees and their dependents directly or through Vendor's contracting
mechanism or insurer.

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                  The parties have caused this Agreement to be executed and
delivered by their respective authorized representatives as stated at the
beginning of this Agreement.

                                       VHA Inc.
                                       ("VHA")

                                       By:       /s/ Mark McKenna
                                               ---------------------------------
                                               Mark McKenna
                                               Vice President

                                       Specialty Laboratories, Inc.
                                       ("Vendor")

                                       By:       /s/
                                               ---------------------------------
                                               Authorized Representative<PAGE>

                                                                   EXHIBIT 10.17

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR CERTAIN REDACTED PROVISIONS OF
THIS AGREEMENT. THE REDACTED PROVISIONS ARE IDENTIFIED BY THREE ASTERISKS
ENCLOSED BY BRACKETS AND UNDERLINED. THE CONFIDENTIAL PORTION HAS BEEN FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION.

                                 AMERINET, INC.
                           GROUP PURCHASING AGREEMENT

                                     Between

                                 AMERINET, INC.

                                       And

                             SPECIALTY LABORATORIES

                                  ("Supplier")

         This Group Purchasing Agreement (the "Agreement") is entered into
         effective as of the date set forth on the signature page hereof,
         between AmeriNet, Inc. ("AmeriNet"), and the Supplier named above
         ("Supplier").

         WHEREAS, AmeriNet is a Delaware corporation, representing the member
         Institutions served by its Shareholders (which member institutions are
         hereinafter referred to as the "Institutions" or Participating
         Institutions"); and

         WHEREAS, AmeriNet's Shareholders are Hospital Shared Services,
         Warrendale, PA; Intermountain Health Care1 Inc., Salt Lake City, UT;
         and Vector Healthsystems, Providence, RI. Supplier acknowledges that
         any Institution meeting the membership requirements of those
         Shareholders shall be eligible for AmeriNet programs and pricing, and
         shall be entitled to place purchase orders under the terms of this
         Agreement for the duration of this Agreement; and

         WHEREAS, AmeriNet heretofore delivered its Request for Proposal to
         Supplier, and Supplier has agreed to the terms of the Request for
         Proposal and this Agreement; and

         WHEREAS, the philosophy of AmeriNet is to secure Agreements with
         suppliers that provide to the Participating Institutions products and
         services which are of optimum quality, at appropriate pricing and with
         appropriate service.

NOW, THEREFORE, Supplier and AmeriNet agree as follows:

1.       The term of this Agreement is for a term of THIRTY-SIX (36) months,
         commencing on SEPTEMBER 1, 1998, and ending on AUGUST 31, 2001 (the
         "Contract Period").

         RESPONSE:         AGREED. PLEASE SEE SPECIALTY'S "CONTRACT TERMS AND
                           RESTRICTIONS".

2.       Execution of this Agreement shall be construed as a guarantee by the
         Supplier of its ability to supply any products included within this
         Agreement to all Participating Institutions for the duration of the
         Agreement. Should the Supplier fail to make any delivery within
         customary time periods, and should such failure cause any Institution
         to

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         purchase in the open market in order to obtain items not delivered,
         then the Supplier shall provide reimbursement to said Institution for
         the difference between contract costs and excess costs occasioned by
         such open-market purchases. Multiple delinquencies in delivery by the
         Supplier may be construed as the Supplier's inability to meet the
         reasonable requirements of AmeriNet's Institutions, and shall
         constitute a material breach of contract sufficient to cause
         cancellation of the Agreement by AmeriNet. Such cancellation shall not
         relieve the Supplier of any liability for damages resulting.

         RESPONSE:         SPECIALTY GUARANTEES THE ABILITY TO PERFORM SERVICES
                           INCLUDED WITHIN THIS AGREEMENT. SPECIALTY SHALL NOT
                           BE LIABLE FOR ANY FAILURE TO DELIVER ITS DUTIES UNDER
                           THIS AGREEMENT DUE TO ACTS OF GOD; ACTS, REGULATIONS
                           OR LAWS OF ANY GOVERNMENT; WAR OR ANY OTHER CONDITION
                           OR CAUSE BEYOND REASONABLE CONTROL.

3.       If in AmeriNet's sole judgment, the Supplier is unable to supply
         Institutions' reasonable requirements for the duration of this
         agreement, AmeriNet reserves the right at any time, or from time to
         time, to select an alternate or additional supplier in order to
         supplant or supplement Supplier.

         RESPONSE:         AGREED.

4.       If in AmeriNet's sole judgment, Supplier does not maintain adequate
         equipment, inventory or personnel to properly service Institutions'
         requirements, then this Agreement shall be subject to cancellation by
         AmeriNet upon thirty (30) days written notice.

         RESPONSE:         AGREED.

5.       AmeriNet reserves the right to terminate this Agreement on twenty-four
         (24) hours notice in the event Supplier files for bankruptcy, for
         reorganization or for protection from its creditors under federal law
         or the laws of any state or nation. AmeriNet further reserves the right
         to cancel this Agreement on twenty-four (24) hours notice in situations
         where the Supplier transfers assets in fraud of its creditors and in
         situations where AmeriNet, in its sole discretion, believes that the
         Supplier is financially unable to adequately carry out its obligations
         under this Agreement.

         RESPONSE:         AGREED.

6.       Attached as Addendum A to this Agreement is a current AmeriNet
         membership list. AmeriNet shall further provide the Supplier with any
         membership additions or deletions on a routine basis. The Supplier
         shall guarantee that all the benefits of this Agreement shall be
         granted to all AmeriNet member Institutions, but only to authorized
         AmeriNet member Institutions.

         RESPONSE:         AGREED.

7.       The Supplier, upon receipt from AmeriNet of membership deletions, shall
         immediately make those deleted Institutions ineligible for contract
         benefits, and will charge those

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         deleted Institutions pricing consistent with lesser volume purchases
         than those represented by the Group (AmeriNet).

         RESPONSE:         AGREED.

8.       Should the Supplier distribute its products directly to Institutions,
         rather than through dealers, each Institution shall place its purchase
         orders directly with the Supplier. It will be the Supplier's
         responsibility to obtain payment from Institutions. All disputes and
         controversies concerning any purchase order, invoice, products,
         shipments or delivery dates shall be handled by Supplier on a direct
         basis with the Institutions. With respect to all products supplied by
         Suppliers, title shall pass from the Supplier to the Institution at the
         point of delivery, and if any sales tax is due, it shall be Supplier's
         sole responsibility to collect and pay such tax. Supplier shall defend,
         indemnify and hold harmless AmeriNet against any and all suits, claims
         and expenses arising out of any failure to pay sales tax on said
         purchased products.

         RESPONSE:         AGREED.

9.       Should the Supplier distribute its products in part or in total through
         dealers, Supplier shall agree to allow access to these special terms
         and pricing only to those dealers approved by AmeriNet. Furthermore,
         Supplier agrees to provide written notification of contract terms and
         pricing to AmeriNet authorized dealers at least 30 working days prior
         to their effective date. Supplier shall be liable for compensation to
         AmeriNet authorized dealers for any and all costs incurred by the
         dealer for credit and rebilling, or any cost otherwise incurred by the
         dealer as a result of Supplier's failure to comply with this provision.

         RESPONSE:         AGREED.

10.      In accordance with state and federal mandates, Supplier is expected to
         furnish to all AmeriNet Institutions, affiliates and participants the
         most current Material Safety Data Sheet (MSDS) for any hazardous
         substance purchased through this Agreement. Failure to comply with this
         stipulation may subject the Agreement to cancellation.

         RESPONSE:         AGREED.

11.      Supplier shall present to Institutions a packing slip or invoice copy
         upon delivery of products. Information to be contained on these
         documents shall include, but not be limited to: purchase order number,
         date of shipment, description of products and quantities shipped.

         RESPONSE:         AGREED.

12.      Supplier shall furnish only those brands specified in this Agreement or
         in subsequent contract addenda and shall not be allowed to furnish
         alternate or substitute brands to any Institution without receiving the
         prior approval of said Institutions.

         RESPONSE:         AGREED.

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13.      All products furnished by Supplier shall be packaged and labeled in
         accordance with good manufacturing practices and shall be shipped in
         containers that conform to all shipping regulations. No product which
         has been repackaged from original containers or which has been
         relabeled or which contains any effacement reducing its value shall be
         acceptable without the express prior consent of the Institutions.

         RESPONSE:         AGREED.  PLEASE SEE SPECIALTY'S "SHIPPING
                           INSTRUCTIONS".

14.      Supplier shall provide for the reporting of all contract sales, by
         Participating Institution, to AmeriNet on a monthly basis unless other
         arrangements are specified in this Agreement.

         In addition, Supplier shall be required to submit an administrative fee
         equal to [***]* of all gross sales realized under this Agreement to
         AmeriNet.

         Supplier shall include the following information when submitting
         administrative fees and contract activity reports:

         I.       Administrative Fees:

                  A.       Checks are to be made payable to "AmeriNet Inc." And
                           NOT to a division or person's name.

                  B.       Check stubs must include AmeriNet's contract number
                           and period for which administrative fees are being
                           paid, i.e. 1/1/99 - 1/31/99. If a payment is being
                           made on behalf of Supplier by a parent corporation,
                           the contract Supplier's name should be identified on
                           the face of the check stub.

         II.      Contract Activity Reports:

                  A.       Supplier's name and AmeriNet's contract number should
                           appear on all reports.

                  B.       Reporting period must be identified, i.e. 1/1/99 -
                           1/31/99.

                  C.       Total product sales volume (not line item detail)
                           must be identified for each member Institution, along
                           with the Institution's name, address and zip code
                           (Note: Zip code is mandatory information). Each
                           Institution's HIN number may be substituted for name,
                           address and zip code.

                  D.       At the end of all reports, total sales volume of all
                           member Institutions must be included.

                  E.       Reports may be submitted in printed form, but
                           submission via electronic media such as magnetic tape
                           or diskette is preferred. Please refer to the
                           enclosed specification sheet (Addendum C) for
                           details.

         All Supplier reports and administrative fee payments are due at
         AmeriNet within 30 days of the close of the reporting period. A
         quick-payment discount of 1% of the net

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         AmeriNet payment due will be allowed for all checks and reports
         received within fifteen (15) days of the close of the reporting period.
         A late payment penalty surcharge of 1-1/2% per month of all net
         AmeriNet payments due may be assessed by AmeriNet for all checks and/or
         reports received more than thirty (30) days past the close of the
         reporting period.

         Suppliers more than sixty (60) days past the close of the reporting
         period in submission of either checks or reports will be subject to
         cancellation of this Agreement by AmeriNet.

         RESPONSE:         SPECIALTY AGREES TO ALL THE SPECIFICATIONS OF ITEM 14
                           WITH ONE EXCEPTION, 1) SUPPLIER SHALL BE REQUIRED TO
                           SUBMIT AN ADMINISTRATIVE FEE EQUAL TO [***]* OF ALL
                           GROSS SALES REALIZED UNDER THIS AGREEMENT TO
                           AMERINET, INC.

15.      During the term of this Agreement, AmeriNet retains the right to audit
         or to have audited Supplier's records, such audits to include but not
         be limited to tracking of administrative contract fees, Supplier's
         costs and Supplier's freight charges. Should any audit produce evidence
         that proper credit for administrative contract fees was not given to
         AmeriNet, or overcharges were incurred by Institutions, then Supplier
         shall respond to such evidence and cure the default within fifteen (15)
         days. Failure to cure shall be sufficient cause for AmeriNet to seek
         actual damages.

         RESPONSE:         AGREED.

16.      Upon request by AmeriNet, Supplier shall provide, at no charge,
         AmeriNet or its Institutions with representative samples of its
         products in quantities which are adequate for purposes of evaluation by
         the Institutions.

         RESPONSE:         AGREED.

17.      All risk of damage to or loss of products shall be assumed by Supplier
         until deliveries are made to, and accepted by, AmeriNet's Institutions.

         RESPONSE:         AGREED.

18.      Supplier acknowledges the Institution's right to return, without
         penalty, cost or delay, excess or unnecessary products for full
         original purchase price credit.

         RESPONSE:         AGREED.

19.      In the performance of its duties and obligations under this Agreement,
         SUPPLIER shall at all times be in compliance with all applicable
         Federal, State and Local laws, regulations and ordinances now in effect
         or as hereafter amended or promulgated.

         RESPONSE:         AGREED.

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EXCHANGE COMMISSION.

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20.      All products supplied by Supplier shall be warranted to be free from
         defects and imperfections in design, material, and workmanship, to be
         merchantable, and if intended for a particular purpose, to be fit for
         such purpose.

         RESPONSE:         AGREED.

21.      Upon request of AmeriNet, Supplier shall provide evidence of insurance
         for a) Worker's Compensation covering its full liability under the
         appropriate states' statutes and b) sufficient comprehensive general
         (and professional, if applicable) liability insurance. Supplier shall
         keep and maintain the foregoing insurance during the term of the
         Agreement. Supplier shall immediately (and no later than fifteen (15)
         days prior to the effective date of any change) notify AmeriNet in
         writing of any changes in the foregoing insurance, including, but not
         limited to, cancellation, material change or change in coverage,
         AmeriNet shall have the right to change the Agreement on thirty (30)
         days notice in the event of any material change in insurance coverage.

         RESPONSE:         AGREED.  CERTIFICATE OF INSURANCE LIABILITY WILL BE
                           FORWARDED UPON REQUEST.

22.      Supplier shall defend, indemnify and hold harmless AmeriNet, its
         Shareholders and Institutions against any and all suits, claims and
         expenses (including attorneys' fees) for damage to property or for
         injury to or death of persons caused by, or in any way arising out of,
         Supplier's furnishing of products, equipment or services thereunder,
         except those which result from the negligent act or omission of a
         purchasing Institution, its officers, agents or employees.

         RESPONSE:         EACH PARTY AGREES TO MUTUALLY INDEMNIFY AND HOLD
                           HARMLESS, THEIR DIRECTORS, OFFICERS, EMPLOYEES, AND
                           AGENTS FROM AND AGAINST ANY AND ALL CLAIMS, ACTIONS,
                           OR LIABILITIES OF ANY NATURE WHICH MAY BE ASSESSED
                           AGAINST THEM BY THIRD PARTIES IN CONNECTION WITH THE
                           PERFORMANCE OF SERVICES UNDER THIS AGREEMENT.

23.      Supplier shall defend, indemnify and hold harmless AmeriNet, its
         Shareholders and Participating Institutions against any and all suits,
         claims and expenses (including attorneys' fees) arising out of the use
         or sale of any product thereunder being in violation of any rights
         under patent, trademark or copyright laws.

         RESPONSE:         EACH PARTY AGREES TO MUTUALLY INDEMNIFY AND HOLD
                           HARMLESS, THEIR DIRECTORS, OFFICERS, EMPLOYEES, AND
                           AGENTS FROM AND AGAINST ANY AND ALL CLAIMS, ACTIONS,
                           OR LIABILITIES OF ANY NATURE WHICH MAY BE ASSESSED
                           AGAINST THEM BY THIRD PARTIES IN CONNECTION WITH THE
                           PERFORMANCE OF SERVICES UNDER THIS AGREEMENT.

24.      Supplier shall not assign, transfer, convey, sublet or otherwise
         dispose of any of its right title or interest in this Agreement without
         the prior written approval of AmeriNet.

         RESPONSE:         AGREED.

<PAGE>

25.      It is hereby understood and agreed that for the term of this Agreement,
         the total price paid by any Institution for products or services under
         this Agreement shall be [***]*. Supplier furthermore agrees to adjust
         the terms and pricing provided under this Agreement to comply with the
         terms set forth in this section should any group or entity with [***]*

         RESPONSE:         AGREED.

26.      In the event PRICE INCREASES occur during the term of this Agreement,
         which are permitted under the terms of this Agreement, Supplier shall
         give AmeriNet at least sixty (60) days prior written notice before
         implementing the increases.

         RESPONSE:         AGREED.

27.      Supplier guarantees that it will not persuade or induce any Institution
         to terminate its status or relationship with AmeriNet or its
         Shareholders by offering more attractive contract prices, terms or
         conditions to the Institution directly or to another group purchasing
         program. Violation of that guarantee will constitute sufficient cause
         for AmeriNet to seek damages from Supplier for loss of all prospective
         contract administration fees.

         RESPONSE:         AGREED.

28.      Should Supplier offer to any AmeriNet Institution a price lower than
         the contract price, or terms more attractive than the terms stipulated
         in this Agreement, then the same offer shall be considered to have been
         made to AmeriNet, and if accepted, will constitute an amendment to this
         Agreement.

         RESPONSE:         AGREED.

29.      Upon the release of new products, Supplier agrees to add such products
         to the Agreement within thirty (30) days, subject to AmeriNet's
         approval.

         RESPONSE:         AGREED.

30.      It is understood that new clinical developments in patient care or new
         regulatory agency restrictions may result in changed conditions, and if
         in AmeriNet's sole discretion, this Agreement or Supplier's products do
         not adequately meet such conditions, AmeriNet shall have the option to
         pursue alternate or additional contracts.

         RESPONSE:         AGREED.

31.      This Agreement shall be signed by a duly authorized representative or
         agent of Supplier, such signature to constitute proof of that person's
         authority to bind the Supplier.

         RESPONSE:         AGREED.

------------------------------
           * PORTIONS OF THIS PAGE HAVE BEEN OMITTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION.

<PAGE>

32.      Supplier represents that it prepared its proposal to AmeriNet without
         any collusion whatsoever among or between any other potential or actual
         contractors of AmeriNet.

         RESPONSE:         AGREED.

33.      In that many AmeriNet member facilities are providers under the federal
         Medicare programs, the provisions of Section 952 of the Omnibus
         Reconciliation Act of 1980 {42 U.S.C. Section 1395X(V0(1)} (the "Act")
         may be in force. Supplier hereby agrees to abide by the terms of the
         Act and its interpretative regulations including, but not limited to,
         maintenance of records concerning services and cost incurred under said
         Agreement for four (4) years, and obtaining such a written contractual
         commitment from any of the Supplier's subcontractors.

         RESPONSE:         AGREED.

34.      The attached "AmeriNet Proposal Data Sheet" (Addendum B) must be
         completed and attached to this Agreement, and shall be a part of this
         Agreement, binding on Supplier.

         RESPONSE:         AGREED.

35. The enclosed addendum's referenced as:

         A.         AmeriNet ValuLab Membership List
         -----------------------------------------------------------------------
         B.         Proposal Data Sheet
         -----------------------------------------------------------------------
         C.         Supplier Contract Reporting
         -----------------------------------------------------------------------
         D.         Supplier Proposal dated:
         -----------------------------------------------------------------------

37.      This document, along with the AmeriNet Request For Proposal, and the
         Addendums B and C (Parts A&B) attached, and the Supplier Proposal when
         properly executed by authorized parties of AmeriNet and the Supplier,
         will constitute the full complete Agreement between the parties as to
         the terms outlined herein.

         RESPONSE:         AGREED.

<PAGE>

I have read and understand AmeriNet's general terms and conditions and any
special terms and conditions contained herein, and agree to supply the products
and services for which prices are proposed in accordance with all provisions,
terms and conditions stated herein.

AGREEMENT ACCEPTED BY:
----------------------

SUPPLIER NAME:                        Specialty Laboratories
                                      ------------------------------------------
ADDRESS:                              2211 Michigan Avenue
                                      ------------------------------------------
                                      Santa Monica, California 90404-3900
                                      ------------------------------------------

AUTHORIZED REPRESENTATIVE:

SIGNED:                               /s/ Gary Nay
                                      ------------------------------------------
NAME (print):                         Gary Nay
                                      ------------------------------------------
TITLE:                                Contract Administration Supervisor
                                      ------------------------------------------
DATE:                                 June 19, 1998
                                      ------------------------------------------

AGREEMENT ACCEPTED BY:
----------------------
NAME:                                 AmeriNet, Inc,
                                      ------------------------------------------
ADDRESS:                              2060 Craigshire Road
                                      ------------------------------------------
                                      P.O. Box 46930
                                      ------------------------------------------
                                      St. Louis, MO 63146
                                      ------------------------------------------

AUTHORIZED REPRESENTATIVE:

SIGNED:                               /s/ Mary Kay Pace
                                      ------------------------------------------
NAME (print):                         Mary Kay Pace
                                      ------------------------------------------
TITLE:                                Director of Operations
                                      ------------------------------------------
DATE:                                 July 15, 1998
                                      ------------------------------------------

 AMERINET SHAREHOLDERS:
       [LOGO]                      [LOGO]                     [LOGO]
Hospital Shared Services    Intermountain Health Care    Vector Healthsystems

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