Document:

Exhibit 10.6

                              DIRECTOR'S AGREEMENT
                              --------------------

     This Director's Agreement (this "Agreement") is made and entered into as of
the 28th day of April 2004, (the "Effective Date"), by and between Robert H. Gow
(hereinafter referred to as "Director") and PharmaFrontiers Corp.(together with
any successor to the business of PharmaFrontiers Corp. by merger, consolidation
or other form of business combination hereinafter referred to as
"PharmaFrontiers").

                              W I T N E S S E T H:

     WHEREAS, the shareholders of PharmaFrontiers wish to elect Director to
serve on the Board of Directors (the "Board") of PharmaFrontiers, and Director
has agreed to serve at the pleasure of the shareholders and on the terms and
conditions below; and

     WHEREAS, PharmaFrontiers' success requires the protection of its
intellectual property, proprietary information and goodwill;

     NOW, THEREFORE, the parties hereto, intending to be legally bound, agree as
follows:

1.   Nomination as Director

     PharmaFrontiers agrees to nominate Director for election by the
shareholders of PharmaFrontiers as director of PharmaFrontiers, and, upon such
election, Director agrees that Director will devote the amount of time, skill,
and efforts during the term of this Agreement to the affairs of PharmaFrontiers
as may be reasonably requested and required of Director and in accordance with
the duties and obligations imposed upon directors of corporations by applicable
law. PharmaFrontiers agrees to recommend to the Board that Director be appointed
as Chairman of PharmaFrontiers immediately upon his election to the Board.
Director agrees to serve as Chairman and to perform such duties and obligations
of the Chairman as are set forth in the bylaws of PharmaFrontiers or as are
assigned to the Chairman by the Board.

2.   Compensation

     As compensation for serving as a member of the Board of PharmaFrontiers,
PharmaFrontiers agrees upon the execution and delivery of this Agreement to
PharmaFrontiers, to issue to Director Eighty Thousand (80,000) shares of the
common stock of PharmaFrontiers. In addition, PharmaFrontiers will pay Director
the sum of $1,000.00 per month for each month Director serves as a Director of
PharmaFrontiers, which shall compensate Director for his expenses in attending
and participating in meetings of the Board. All compensation paid Director shall
be subject to such payroll and withholding deductions as may be required by law
or the policies of PharmaFrontiers.

                                                                     Page 1 of 7

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3.   Confidential and Proprietary Information; Documents

     3.1 PharmaFrontiers shall provide Director with information deemed secret
and confidential by PharmaFrontiers. Such secret or confidential information or
know-how of PharmaFrontiers (referred to collectively as "Confidential
Information") shall include, without limitation, the following: the status and
plans for research and development; materials, cells, tissues, and other
biological samples and specimens; cell banking methods, apparatus, and services;
pending and planned patent applications (until published by the Patent Office);
invention disclosures; research and technical data and information; methods of
creating, preparing, and using stem cells and other biological materials;
license, sublicense, and other agreements relating to intellectual property
rights; PharmaFrontiers' plans; customer or contact information; contributor
information; strategies, costs, prices, uses, applications of products and
services; results of and data from investigations or experiments; all apparatus,
products, processes, compositions, samples, formulas, computer programs, pricing
policy, financial information, and methods of doing business; policy and/or
procedure manuals, training and recruiting procedures; accounting procedures;
the status and content of PharmaFrontiers' contracts with its contributors,
clients, and customers; PharmaFrontiers' business philosophy, and servicing
methods and techniques; all at any time used, developed, or investigated by
PharmaFrontiers, before or during the term of this Agreement, which are not
generally available to the public or which are maintained as confidential by
PharmaFrontiers.

     3.2 Director recognizes and acknowledges that Director will have access to
certain information of PharmaFrontiers that is confidential and proprietary and
constitutes valuable and unique property of PharmaFrontiers. Director agrees
that Director will not at any time, either during or subsequent to the term of
this Agreement, disclose to others, use, copy or permit to be copied, except in
pursuance of Director's duties on behalf of PharmaFrontiers, its successors,
assigns or nominees, or as required by the order of any tribunal having
jurisdiction or by mandatory provisions of applicable law, any Confidential
Information or know-how of PharmaFrontiers without the prior written consent of
the Board of PharmaFrontiers. Director further agrees to maintain in confidence
any confidential information of third parties received as a result of Director's
relationship with PharmaFrontiers.

     3.3 Director further agrees to deliver to PharmaFrontiers promptly after
his resignation, removal or failure to be nominated or elected as a member of
the Board, all biological materials correspondence, memoranda, notes, records,
drawings, sketches, plans, customer, client and/or contributor lists, product
compositions, or other documents and all copies thereof (all of which are
hereafter referred to as the "Documents"), made, composed or received by
Director, solely or jointly with others, and which are in Director's possession,
custody, or control at such date and which are related in any manner to the
past, present, or anticipated business of PharmaFrontiers.

     3.4 Director further agrees that Director will not, during the term of this
Agreement, and on behalf of PharmaFrontiers accept or agree to receive from
persons not employed by PharmaFrontiers, any confidential information not
belonging to PharmaFrontiers, unless prior to such receipt or acceptance a valid
agreement has been executed between PharmaFrontiers and the disclosing party
that states that PharmaFrontiers will not be in a confidential relationship with
the disclosing party. Director further agrees that Director will not use in
violation of any confidentiality obligation binding upon Director any
confidential information belonging to Director's employer or former employer, or
any other third parties.

                                                                     Page 2 of 7

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     3.5 In the event of a breach or threatened breach of any of the provisions
of Section 4, or any breach by Director of his fiduciary obligation to
PharmaFrontiers and its shareholders, PharmaFrontiers shall be entitled to an
injunction ordering the return of such Documents and any and all copies thereof
and restraining Director from using or disclosing, for Director's benefit or the
benefit of others, in whole or in part, any Confidential Information, including
but not limited to the Confidential Information which such Documents contain,
constitute, or embody. Director further agrees that any breach or threatened
breach of any of the provisions of Section 4 would cause irreparable injury to
PharmaFrontiers for which it would have no adequate remedy at law. Nothing
herein shall be construed as prohibiting PharmaFrontiers from pursuing any other
remedies available to it for any such breach or threatened breach, including the
recovery of damages.

4.   Noncompetition/No-Hire Agreement

     4.1 Director agrees that, from the Effective Date until a period of one (1)
year following the date of his resignation, removal or failure to be nominated
or elected as a member of the Board, (the "Noncompetition Period"), Director
will not directly or indirectly, either as an employee, employer, consultant,
agent, principal, partner, corporate officer, director, or in any other
individual or representative capacity, engage or participate in any "Competitive
Business" anywhere in the United States of America, Canada or the European Union
(the "Noncompetition Territory"). As used herein, a "Competitive Business" is
defined as any business, including those relating to stem cells or cell banking,
which provides the same or substantially the same products, services or licenses
to intellectual property rights, in whole or in part, as are provided by
PharmaFrontiers during the term of this Agreement.

     4.2 Director further agrees that during the Noncompetition Period and
within the Noncompetition Territory Director will not, directly or indirectly,
either as an employee, employer, consultant, agent, principal, partner,
corporate officer, director, or in any other individual or representative
capacity, call on, solicit, recruit, or attempt to call on, solicit, or recruit,
or attempt to hire any of the employees of PharmaFrontiers, regardless of
whether for the benefit of the Director or for any other person, firm, or
corporation.

     4.3 Director shall not during the Noncompetition Period and within the
Noncompetition Territory, either directly or indirectly (i) make known to any
Competitive Business the names and addresses of any of PharmaFrontiers'
customers or contacts or any other information pertaining to such persons or
businesses or (ii) call on, solicit, or take away, or attempt to call on,
solicit or take away any of the customers of PharmaFrontiers with whom Director
became acquainted during Director's service as a member of PharmaFrontiers'
Board, regardless of whether for the benefit of the Director or for any other
person, firm or corporation.

                                                                     Page 3 of 7

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     4.4 Director agrees that this Section is ancillary to this Agreement, and
Director acknowledges that the consideration given by PharmaFrontiers for this
Agreement includes PharmaFrontiers' agreement to provide to the Director access
to the Confidential Information. Further, the existence of any claim or cause of
action of Director against PharmaFrontiers or any officer, director, or employee
of PharmaFrontiers, whether predicated on this Agreement or otherwise, shall not
constitute a defense to the enforcement by PharmaFrontiers of Director's
covenants contained in this Agreement. In addition, this Agreement shall
continue to be binding upon Director in accordance with its terms,
notwithstanding the termination of this Agreement.

     4.5 Director agrees that Director's breach or violation, or threat thereof,
of this covenant not to compete shall entitle PharmaFrontiers, as a matter of
right, to an injunction without the necessity of posting bond, issued by any
court of competent jurisdiction, restraining any further or continued breach or
violation of this covenant. Such right to an injunction shall be cumulative and
in addition to, and not in lieu of, any other remedies to which PharmaFrontiers
may show itself justly entitled. Further, during any period in which Director is
in breach of this covenant not to compete, the time period of this covenant
shall be extended for an amount of time that Director is in breach.

5.   Inventions and Other Intellectual Property

     5.1 Director agrees to hold in complete trust for the benefit of
PharmaFrontiers, and to disclose promptly and fully to PharmaFrontiers in
writing, and hereby assigns, and binds Director's heirs, executors,
administrators, and all legal representatives to assign, to PharmaFrontiers any
and all inventions, discoveries, ideas, concepts, improvements, copyrightable
works, biological materials, and other developments (all of the above are
collectively referred to as the "Developments") conceived, made, discovered or
developed by him, solely or jointly with others, during the term of this
Agreement, whether during or outside of usual working hours and whether on
PharmaFrontiers' premises or not, which relate in any manner to the past,
present or anticipated business of PharmaFrontiers. The parties agree that, if
Director is an inventor as determined by U.S. patent law for any invention,
Director shall be named as an inventor in connection with any patent application
therefor. Any and all such Developments shall be the sole and exclusive property
of PharmaFrontiers, whether patentable, copyrightable, or neither, and Director
agrees that Director will assist and fully cooperate in every way, at
PharmaFrontiers' expense, in securing, maintaining, and enforcing, for the
benefit of PharmaFrontiers or its designee, patents, copyrights or other types
of proprietary or intellectual property protection for such Developments in any
and all countries. Director acknowledges and agrees that any and all such
Developments conceived, created, or authored by him is a "work made for hire,"
as defined by the federal copyright laws, and therefore all copyrights in and to
such works are and will be owned by PharmaFrontiers. To the extent that Director
authors any copyrightable work in any medium during the term of this Agreement
which relates or pertains in any way to PharmaFrontiers or any of the operations
or activities of either and which was is held not a work made for hire, Director
hereby assigns all right, title, and interest, including but not limited to all
rights of copyright, in and to such works to PharmaFrontiers. Within six months
following the termination of this Agreement, and without limiting the generality
of the foregoing, any Development of the Director relating to any
PharmaFrontiers subject matter on which Director worked or was informed during
the term of this Agreement shall be conclusively presumed to have been conceived
and made prior to the termination of this Agreement (unless the Director clearly
proves that such Development was conceived and made following the termination of
this Agreement), and shall accordingly belong, and be assigned, to
PharmaFrontiers and shall be subject to this Agreement.

                                                                     Page 4 of 7

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     5.2 Without limiting the foregoing, Director agrees at the request of
PharmaFrontiers (but without additional compensation from PharmaFrontiers during
Director's employment by PharmaFrontiers) to execute any and all papers and
perform all lawful acts which PharmaFrontiers deems necessary for the
preparation, filing, prosecution, and maintenance of applications for United
States and foreign letters patent, or for United States and foreign copyrights,
on the Developments, and to execute such instruments as are necessary or
convenient to assign to PharmaFrontiers, its successors, assigns or nominees,
all of the Director's right, title, and interest in the Developments and the
like, so as to establish, maintain or perfect, in PharmaFrontiers, its
successors, assigns or nominees, the entire right, title, and interest to the
Developments, and also to execute any instruments necessary or which
PharmaFrontiers may deem desirable it connection with any continuation, renewal
or reissue thereof, or in the conduct of any proceedings or litigation in regard
thereto.

     5.3 All expenses incurred by the Director by reason of the performance of
any of the obligations set forth in this Section on Inventions shall be borne by
PharmaFrontiers. Should the Director's assistance be requested by
PharmaFrontiers after termination of this Agreement, PharmaFrontiers would
compensate the Director at a reasonable rate.

6.   Conflicts of Interest

     6.1 In keeping with Director's fiduciary duties to PharmaFrontiers,
Director agrees that Director shall not, directly or indirectly, become involved
in any conflict of interest, or upon discovery thereof, allow such a conflict to
continue. Moreover, Director agrees that Director shall promptly disclose to the
Board of PharmaFrontiers any facts which might involve any reasonable
possibility of a conflict of interest as PharmaFrontiers is currently and in the
future configured and practicing business. Director shall maintain the highest
standards of conduct, and shall not do anything likely to injure the reputation
or goodwill of PharmaFrontiers, or embarrass or otherwise generate adverse
publicity for or bring unwanted attention to PharmaFrontiers.

     6.2 It is agreed that any direct or indirect interest in, connection with,
or benefit from any outside activities, particularly commercial activities,
which interest might in any way adversely affect PharmaFrontiers or any of its
subsidiaries or affiliates, involves a possible conflict of interest.
Circumstances in which a conflict of interest on the part of Director would or
might arise, and which should be reported immediately by Director to an officer
of PharmaFrontiers, include, without limitation, the following: (a) ownership of
a material interest in, acting in any capacity for, or accepting directly or
indirectly any payments, services or loans from a supplier, contractor,
subcontractor, customer or other entity with which PharmaFrontiers does
business; (b) misuse of information or facilities to which Director has access
in a manner which will be detrimental to PharmaFrontiers' interest; (c)
disclosure or other misuse of information of any kind obtained through the
Director's connection with PharmaFrontiers; (d) acquiring or trading in,
directly or indirectly, other properties or interests connected with the design,
manufacture or marketing of products designed, manufactured or marketed by
PharmaFrontiers; (e) the appropriation to the Director or the diversion to
others, directly or indirectly, of any opportunity in which it is known or could
reasonably be anticipated that PharmaFrontiers would be interested; and (f) the
ownership, directly or indirectly, of a material interest in an enterprise in
competition with PharmaFrontiers or its dealers and distributors or acting as a
director, officer, partner, consultant, Director or agent of any enterprise
which is in competition with PharmaFrontiers or its dealers or distributors.

                                                                     Page 5 of 7

<PAGE>

7.   Prior Discoveries

     Director has no unpatented inventions and discoveries made or conceived by
Director prior to the Effective Date that relate to stem cell isolation,
identification and/or expansion and/or cell banking.

8.   Remedies

     Director and PharmaFrontiers agree that, because damages at law for any
breach or nonperformance of this Agreement by Director, while recoverable, are
and will be inadequate, this Agreement may be enforced in equity by specific
performance, injunction, accounting or otherwise.

9.   Miscellaneous

     9.1 This Agreement is made and entered into as of the Effective Date and
the rights and obligations of the parties hereto shall be binding upon the heirs
and legal representatives of the Director and the successors and assigns of
PharmaFrontiers. This Agreement may be assigned by PharmaFrontiers (including
assignment by operation of law to any successor to the business of
PharmaFrontiers by merger, consolidation or other business combination) without
the consent of Director but is personal to the Director and no rights, duties,
and obligations of Director hereunder may be assigned without the consent of
PharmaFrontiers or its assigns, which may be granted or withheld in its sole
discretion.

     9.2 No waiver or non-action with respect to any breach by the other party
of any provision of this Agreement, nor the waiver or non-action with respect to
any breach of the provisions of similar agreements with other Directors shall be
construed to be a waiver of any succeeding breach of such provision, or as a
waiver of the provision itself.

     9.3 Should any portions hereof be held to be invalid or wholly or partially
unenforceable, such holding shall not invalidate or void the remainder of this
Agreement. The portions held to be invalid or unenforceable shall be revised and
reduced in scope so as to be valid and enforceable, or, if such is not possible,
then such portions shall be deemed to have been wholly excluded with the same
force and effect as if it had never been included herein.

     9.4 Director's obligations under this Agreement to PharmaFrontiers shall
survive Director's resignation, removal or failure to be nominated or elected as
a member of the Board of PharmaFrontiers.

     9.5 This Agreement supersedes, replaces and merges any and all prior and
contemporaneous understandings, representations, agreements and discussions
relating to the same or similar subject matter as that of this Agreement between
Director and PharmaFrontiers and constitutes the sole and entire agreement
between the Director and PharmaFrontiers with respect to the subject matter of
this Agreement.

                                                                     Page 6 of 7

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     9.6 The laws of the State of Texas, excluding any conflicts of law rule or
principle that might otherwise refer to the substantive law of another
jurisdiction, will govern the interpretation, validity and effect of this
Agreement without regard to the place of execution or the place for performance
thereof, and PharmaFrontiers and Director agree that the state and federal
courts in Harris County, Texas, shall have personal jurisdiction and venue over
PharmaFrontiers and Director to hear all disputes arising under this Agreement.
This Agreement is to be at least partially performed in Harris County, Texas.

     9.7 All notices and other communications required or permitted hereunder or
necessary or convenient in connection herewith shall be in writing and shall be
deemed to have been given when mailed by registered mail or certified mail,
return receipt requested, as follows:

     If to PharmaFrontiers, to:

     Mr. Warren Lau
     PharmaFrontiers Corp.
     10211 Silver Leafe Lane
     Tomball, Texas 77375

     If to Director, to:

     Mr. Robert H. Gow
     5 Woods Edge Lane
     Houston, Texas 77024

or to such other addresses as either party may designate by notice to the other
party hereto in the manner specified in this section.

     9.8 This Agreement may not be changed or terminated orally, and no change,
termination or waiver of this Agreement or of any of the provisions herein
contained shall be binding unless made in writing and signed by both parties,
and in the case of PharmaFrontiers, by an authorized officer of PharmaFrontiers.
Any change or changes, from time to time, in Director's compensation shall not
be, nor be deemed to be, a change, termination or waiver of this Agreement or of
any of the provisions herein contained.

PHARMAFRONTIERS CORP.                          DIRECTOR

By:      /s/Warren C. Lau                      By:   /s/Robert H. Gow
    -----------------------------------            ---------------------
           Warren C. Lau                             Robert H. Gow

                                                                     Page 7 of 7Exhibit 10.7

                              DIRECTOR'S AGREEMENT

     This Director's Agreement (this "Agreement") is made and entered into as of
the 23rd day of November, 2004, (the "Effective Date"), by and between Paul
Frison (hereinafter referred to as "Director") and PharmaFrontiers Corp.
(together with any successor to the business of PharmaFrontiers Corp. by merger,
consolidation or other form of business combination hereinafter referred to
collectively as "PharmaFrontiers").

                                   WITNESSETH:

     WHEREAS, the shareholders of PharmaFrontiers wish to elect Director to
serve on the Board of Directors (the "Board") of PharmaFrontiers, and Director
has agreed to serve at the pleasure of the shareholders and on the terms and
conditions below; and

     WHEREAS, PharmaFrontiers' success requires the protection of its
intellectual property, proprietary information and goodwill;

     NOW, THEREFORE, the parties hereto, intending to be legally bound, agree as
follows:

1.   Appointment as Director

     PharmaFrontiers shall appoint Director to the Board of PharmaFrontiers,
and, upon such appointment, Director agrees that Director will devote the amount
of time, skill, and efforts during the term of this Agreement to the affairs of
PharmaFrontiers as may be reasonably requested and required of Director and in
accordance with the duties and obligations imposed upon directors of
corporations by applicable law.

2.   Compensation

     As compensation for serving as a member of the Board of PharmaFrontiers,
PharmaFrontiers agrees upon the execution and delivery of this Agreement to
PharmaFrontiers, to grant to Director an option to purchase up to 20,000 shares
of the common stock of PharmaFrontiers, the terms of which are set forth in the
Incentive Stock Option Agreement attached hereto as Exhibit "A" (the "Option
Agreement"). In addition, PharmaFrontiers will grant to Director a five-year
option to purchase up to 15,000 shares of common stock of PharmaFrontiers at an
exercise price of Market price per share upon each re-election to the Board of
PharmaFrontiers at each annual shareholders meeting, pursuant to terms similar
to those set forth in the Option Agreement. The Company shall pay Director the
sum of $1,000 for each Board meeting attended in person, and $500 for each Board
meeting attended by telephony.

                                                                     Page 1 of 7

<PAGE>

3.   Confidential and Proprietary Information; Documents

     3.1 PharmaFrontiers shall provide Director with information deemed secret
and confidential by PharmaFrontiers. Such secret or confidential information or
know-how of PharmaFrontiers (referred to collectively as "Confidential
Information") shall include, without limitation, the following: the status and
plans for research and development; materials, cells, tissues, and other
biological samples and specimens; cell banking methods, apparatus, and services;
pending and planned patent applications (until published by the Patent Office);
invention disclosures; research and technical data and information; methods of
creating, preparing, and using stem cells and other biological materials;
license, sublicense, and other information; contributor information; strategies,
costs, prices, uses, applications of products and services; results of and data
from investigations or experiments; all apparatus, products, processes,
compositions, samples, formulas, computer programs, pricing policy, financial
information, and methods of doing business; policy and/or procedure manuals,
training and recruiting procedures; accounting procedures; the status and
content of PharmaFrontiers' contracts with its contributors, clients, and
customers; PharmaFrontiers' business philosophy, and servicing methods and
techniques; all at any time used, developed, or investigated by PharmaFrontiers,
before or during the term of this Agreement, which are not generally available
to the public or which are maintained as confidential by PharmaFronteirs.

     3.2 Director recognizes and acknowledges that Director will have access to
certain information of PharmaFrontiers that is confidential and proprietary and
constitutes valuable and unique property of PharmaFrontiers. Director agrees
that Director will not at any time, either during or subsequent to the term of
this Agreement, disclose to others, use, copy or permit to be copied, except in
pursuance of Director's duties on behalf of PharmaFrontiers, its successors,
assigns or nominees, or as required by the order of any tribunal having
jurisdiction or by mandatory provisions of applicable law, any Confidential
Information or know-how of PharmaFrontiers without the prior written consent of
the Board of PharmaFrontiers. Director further agrees to maintain in confidence
any confidential information of third parties received as a result of Director's
relationship with PharmaFrontiers.

     3.3 Director further agrees to deliver to PharmaFrontiers promptly after
his resignation, removal or failure to be nominated or elected as a member of
the Board, all biological materials correspondence, memoranda, notes, records,
drawings, sketches, plans, customer, client and/or contributor lists, product
compositions, or other documents and all copies thereof (all of which are
hereafter referred to as the "Documents"), made, composed or received by
Director, solely or jointly with others, and which are in Director's possession,
custody, or control at such date and which are related in any manner to the
past, present, or anticipated business of PharmaFrontiers.

     3.4 Director further agrees that Director will not, during the term of this
Agreement, and on behalf of PharmaFrontiers accept or agree to receive from
persons not employed by PharmaFrontiers, any confidential information not
belonging to PharmaFrontiers, unless prior to such receipt or acceptance a valid
agreement has been executed between PharmaFrontiers and the disclosing party
that states that PharmaFrontiers will not be in a confidential relationship with
the disclosing party. Director further agrees that Director will not use in
violation of any confidentiality obligation binding upon Director any
confidential information belonging to Director's employer or any former
employer, or any other third parties.

                                                                     Page 2 of 7

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     3.5 In the event of a breach or threatened breach of any of the provisions
of Section 4, or any breach by Director of his fiduciary obligation to
PharmaFrontiers and its shareholders, PharmaFrontiers shall be entitled to an
injunction ordering the return of such Documents and any and all copies thereof
and restraining Director from using or disclosing, for Director's benefit or the
benefit of others, in whole or in part, any Confidential Information, including
but not limited to the Confidential Information which such Documents contain,
constitute, or embody. Director further agrees that any breach or threatened
breach of any of the provisions of Section 4 would cause irreparable injury to
PharmaFrontiers for which it would have no adequate remedy at law. Nothing
herein shall be construed as prohibiting PharmaFrontiers from pursuing any other
remedies available to it for any such breach or threatened breach, including the
recovery of damages.

4.   Director's Current Position as President and CEO of Houston
     Technology Center

     4.1 Not withstanding anything herein, all parties understand and agree that
Director may conduct all normal functions, contacts, relations and support of
any companies and activities in which he is normally engaged, as President and
CEO of the Houston Technology Center.

5.   Inventions and Other Intellectual Property

     5.1 Director agrees to hold in complete trust for the benefit of
PharmaFrontiers, and to disclose and fully to PharmaFrontiers in writing, and
hereby assigns, and binds Director's heirs, executors, administrators, and all
legal representatives to assign, to PharmaFrontiers any and all inventions,
discoveries, ideas, concepts, improvements, copyrightable works, biological
materials, and other developments (all of the above are collectively referred to
as the "Developments") conceived, made, discovered or developed by him, solely
or jointly with others, during the term of this Agreement, whether during or
outside of usual working hours and whether on PharmaFrontiers' premises or not,
which relate in any manner to the past, present or anticipated business of
PharmaFrontiers. The parties agree that, if Director is an inventor as
determined by U.S. patent law for any invention, Director shall be named as an
inventor in connection with any patent application therefore. Any and all such
Developments shall be the sole and exclusive property of PharmaFrontiers,
whether patentable, copyrightable, or neither, and Director agrees that Director
will assist and fully cooperate in every way, at PharmaFrontiers' expense, in
securing, maintaining, and enforcing, for the benefit of PharmaFrontiers or its
designee, patents, copyrights or other types of proprietary or intellectual
property protection for such Developments in any and all countries. Director
acknowledges and agrees that any and all such Developments conceived, created,
or authored by him is a "work made for hire," as defined by the federal
copyright laws, and therefore all copyrights in and to such works are and will
be owned by PharmaFrontiers. To the extent that Director authors any

                                                                     Page 3 of 7

<PAGE>

copyrightable work in any medium during the term of this Agreement which relates
or pertains in any way to PharmaFrontiers or any of the operations or activities
of either and which was is held not a work made for hire, Director hereby
assigns all right. title, and interest, including but not limited to all rights
of copyright, in and to such works to PharmaFrontiers. Within six months
following the termination of this Agreement, and without limiting the generality
of the foregoing, any Development of the Director relating to any
PharmaFrontiers subject matter on which Director worked or was informed during
the term of this Agreement shall be conclusively presumed to have been conceived
and made prior to the termination of this Agreement (unless the Director clearly
proves that such Development was conceived and made following the termination of
this Agreement), and shall accordingly belong, and be assigned to
PharmaFrontiers and shall be subject to this Agreement.

     5.2 Without limiting the foregoing, Director agrees at the request of
PharmaFrontiers (but without additional compensation from PharmaFrontiers during
Director's employment by PharmaFrontiers) to execute any and all papers and
perform all lawful acts which PharmaFrontiers deems necessary for the
preparation, filing, prosecution, and maintenance of applications for United
States and foreign letters patent or for United States and foreign copyrights,
on the Developments, and to execute such instruments as are necessary or
convenient to assign to PharmaFrontiers, its successors, assigns or nominees,
all of the Director's right, title, and interest in the Developments and the
like, so as to establish, maintain or perfect, in PharmaFrontiers, its
successors, assigns or nominees, the entire right, title, and interest to the
Developments, and also to execute any instruments necessary or which
PharmaFrontiers may deem desirable it connection with any continuation, renewal
or reissue thereof, or in the conduct of any proceedings or litigation in regard
thereto.

     5.3 All expenses incurred by the Director by reason of the performance of
any of the obligations set forth in this Section on Inventions shall be borne by
PharmaFrontiers. Should the Director's assistance be requested by
PharmaFrontiers after termination of this Agreement, PharmaFrontiers would
compensate the Director at a reasonable rate.

6.   Conflicts of Interest

     6.1 In keeping with Director's fiduciary duties to PharmaFrontiers,
Director agrees that Director shall not, directly or indirectly, become involved
in any conflict of interest, or upon discovery thereof, allow such a conflict to
continue. Moreover, Director agrees that Director shall promptly disclose to the
Board of PharmaFrontiers any facts which might involve any reasonable
possibility of a conflict of interest as PharmaFrontiers is currently and in the
future configured and practicing business. Director shall maintain the highest
standards of conduct, and shall not do anything likely to injure the reputation
or goodwill of PharmaFrontiers, or embarrass or otherwise generate adverse
publicity for or bring unwanted attention to PharmaFrontiers.

                                                                     Page 4 of 7

<PAGE>

     6.2 It is agreed that any direct or indirect interest in, connection with,
or benefit from any outside activities, particularly commercial activities,
which interest might in any way adversely affect PharmaFrontiers or any of its
subsidiaries or affiliates, involves a possible conflict of interest.
Circumstances in which a conflict of interest on the part of Director would or
might arise, and which should be reported immediately by Director to an officer
of PharmaFrontiers, include, without limitation, the following: (a) ownership of
a material interest in, acting in any capacity for, or accepting directly or
indirectly any payments, services or loans from a supplier, contractor,
subcontractor, customer or other entity with which PharmaFrontiers does
business; (b) misuse of information or facilities to which Director has access
in a manner which will be detrimental to PharmaFrontiers' interest; (c)
disclosure or other misuse of information of any kind obtained through the
Director's connection with PharmaFrontiers; (d) acquiring or trading in,
directly or indirectly, other properties or interests connected with the design,
manufacture or marketing of products designed. manufactured or marketed by
PharmaFrontiers; (e) the appropriation to the Director or the diversion to
others, directly or indirectly, of any opportunity in which it is known or could
reasonably be anticipated that PharmaFrontiers would be interested; and (f) the
ownership, directly or indirectly, of a material interest in an enterprise in
competition with PharmaFrontiers or its dealers and distributors or acting as a
director, officer, partner, consultant, Director or agent of any enterprise
which is in competition with PharmaFrontiers or its dealers or distributors.

7.   Prior Discoveries

     Director has no unpatented inventions and discoveries made or conceived by
Director prior to the Effective Date that relate to stem cell isolation,
identification and/or expansion and/or cell banking.

8.   Remedies

     Director and PharmaFrontiers agree that, because damages at law for any
breach or nonperformance of this Agreement by Director, while recoverable, are
and will be inadequate, this Agreement may be enforced in equity by specific
performance, injunction, accounting or otherwise.

9.   Miscellaneous

     9.1 This Agreement is made and entered into as of the Effective Date and
the rights and obligations of the parties hereto shall be binding upon the heirs
and legal representatives of the Director and the successors and assigns of
PharmaFrontiers. This Agreement may be assigned by PharmaFronteirs (including
assignment by operation of law to any successor to the business of
PharmaFronteirs by merger, consolidation or other business combination) without
the consent of Director but is personal to the Director and no rights, duties,
and obligations of Director hereunder may be assigned without the consent of
PharmaFrontiers or its assigns, which may be granted or withheld in its sole
discretion.

                                                                     Page 5 of 7

<PAGE>

     9.2 No waiver or non-action with respect to any breach by the other party
of any provision of this Agreement, nor the waiver or non-action with respect to
any breach of the provisions of similar agreements with other Directors shall be
construed to be a waiver of any succeeding breach of such provision, or as a
waiver of the provision itself.

     9.3 Should any portions hereof be held to be invalid or wholly or partially
unenforceable, such holding shall not invalidate or void the remainder of this
Agreement. The portions held to be invalid or unenforceable shall be revised and
reduced in scope so as to be valid and enforceable, or, if such is not possible,
then such portions shall be deemed to have been wholly excluded with the same
force and effect as it if had never been included herein.

     9.4 Director's obligations under this Agreement to PharmaFrontiers shall
survive Director's resignation, removal or failure to be nominated or elected as
a member of the Board of PharmaFronteirs.

     9.5 This Agreement supersedes, replaces and merges any and all prior and
contemporaneous understandings, representations, agreements and discussions
relating to the same or similar subject matter as that of this Agreement between
Director and PharmaFronteirs and constitutes the sole and entire agreement
between the Director and PharmaFrontiers with respect to the subject matter of
this Agreement.

     9.6 The laws of the State of Texas, excluding any conflicts of law rule or
principle that might otherwise refer to the substantive law of another
jurisdiction, will govern the interpretation, validity and effect of this
Agreement without regard to the place of execution or the place for performance
thereof, and PharmaFronteirs and Director agree that the state and federal
courts in Harris county, Texas, shall have personal jurisdiction and venue over
PharmaFrontiers and Director to hear all disputes arising under this Agreement.
This Agreement is to be at least partially performed in Harris County, Texas.

     9.7 All notices and other communications required or permitted hereunder or
necessary or convenient in connection herewith shall be in writing and shall be
deemed to have given when mailed by registered mail or certified mail, return
receipt requested, as follows:

     If to PharmaFronteirs, to:

     Mr. David McWilliams
     PharmaFrontiers Corp.
     835 Greens Parkway,
     Suite #150 Houston, TX 77067

                                                                     Page 6 of 7

<PAGE>

     If to Director, to:

     Paul Frison
     102 N. Wynden Estates Court
     Houston, TX 77056

or to such other addresses as either party may designate by notice to the other
party hereto in the manner specified in this section.

     9.8 This Agreement may not be changed or terminated orally, and no change,
termination or waiver of this Agreement or of any of the provisions herein
contained shall be binding unless made in writing and signed by both parties,
and in the case of PharmaFrontiers, by an authorized officer of PharmaFrontiers.
Any change or changes, from time to time, in Director's compensation shall not
be deemed to be, a change, termination or waiver of this Agreement or of any of
the provisions herein contained.

IN WITNESS WHEREOF, the undersigned have hereby caused this Agreement to be
effective as of the date first written above.

                                      PharmaFrontiers Corp., a Texas Corporation

                                      By: /s/ David B. McWilliams
                                          --------------------------------------
                                          David McWilliams, President

                                      By: /s/Paul Frison
                                          --------------------------------------
                                          Paul Frison

                                                                     Page 7 of 7

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