Document:

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                                                                  Exhibit 10.1.4
June 8, 2005

Healthcare Acquisition Corp.
2116 Financial Center
666 Walnut Street
Des Moines, IA  50309

Maxim Group LLC
405 Lexington Avenue
New York, NY  10174

RE: INITIAL PUBLIC OFFERING

Gentlemen:

The undersigned stockholder, officer and/or director of Healthcare Acquisition
Corp. ("Company"), in consideration of Maxim Group LLC ("Maxim") entering into a
letter of intent ("Letter of Intent") to underwrite an initial public offering
of the securities of the Company ("IPO") and embarking on the IPO process,
hereby agrees as follows (certain capitalized terms used herein are defined in
paragraph 11 hereof):

1.  If the Company solicits approval of its stockholders of a Business
Combination, the undersigned will vote all Insider Shares owned by him in
accordance with the majority of the votes cast by the holders of the IPO Shares.

2.  In the event that the Company fails to consummate a Business Combination
within 18 months from the effective date ("Effective Date") of the registration
statement relating to the IPO (or 24 months under the circumstances described in
the prospectus relating to the IPO), the undersigned will take all reasonable
actions within his power to cause the Company to liquidate as soon as reasonably
practicable. In such event, the undersigned hereby waives any and all right,
title, interest or claim of any kind in or to any liquidating distributions by
the Company, including, without limitation, any distribution of the Trust Fund
(as defined in the Letter of Intent) as a result of such liquidation with
respect to his Insider Shares ("Claim") and hereby waives any Claim the
undersigned may have in the future as a result of, or arising out of, any
contracts or agreements with the Company and will not seek recourse against the
Trust Fund for any reason whatsoever. The undersigned agrees to indemnify and
hold harmless the Company against any and all loss, liability, claims, damage
and expense whatsoever (including, but not limited to, any and all legal or
other expenses reasonably incurred in investigating, preparing or defending
against any litigation, whether pending or threatened, or any claim whatsoever)
to which the Company may become subject as a result of any claim by any vendor
that is owed money by the Company for services rendered or products sold but
only to the extent necessary to ensure that such loss, liability, claim, damage
or expense does not reduce the amount in the Trust Fund (as defined in the
Letter of Intent).

                                      -16-
<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

3.  In order to minimize potential conflicts of interest which may arise from
multiple affiliations, the undersigned agrees to present to the Company for its
consideration, and not to any other person or entity unless the opportunity is
rejected by the Company, those opportunities to acquire an operating company the
undersigned reasonably believes are suitable opportunity for the Company, until
the earlier of the consummation by the Company of a Business Combination, the
liquidation of the Company or until such time as the undersigned ceases to be an
officer or director of the Company, subject to any fiduciary obligations the
undersigned might have.

4.  The undersigned acknowledges and agrees that the Company will not consummate
any Business Combination which involves a company which is affiliated with any
of the Insiders unless the Company obtains an opinion from an independent
investment banking firm reasonably acceptable to Maxim that the business
combination is fair to the Company's stockholders from a financial perspective.

5.   Neither the undersigned, any member of the family of the undersigned, nor
any Affiliate of the undersigned will be entitled to receive and will not accept
any compensation for services rendered to the Company prior to the consummation
of the Business Combination; provided that the undersigned shall be entitled to
reimbursement from the Company for his out-of-pocket expenses incurred in
connection with seeking and consummating a Business Combination.

6.  Neither the undersigned, any member of the family of the undersigned, or any
Affiliate of the undersigned will be entitled to receive or accept a finder's
fee or any other compensation in the event the undersigned, any member of the
family of the undersigned or any Affiliate of the undersigned originates a
Business Combination.

7.  The undersigned will escrow his Insider Shares for the three-year period
commencing on the Effective Date subject to the terms of a Stock Escrow
Agreement which the Company will enter into with the undersigned and an escrow
agent acceptable to the Company.

8.  The undersigned agrees to be a Director of the Company until the earlier of
the consummation by the Company of a Business Combination or the liquidation of
the Company. The undersigned's biographical information furnished to the Company
and Maxim and attached hereto as Exhibit A is true and accurate in all respects,
does not omit any material information with respect to the undersigned's
background and contains all of the information required to be disclosed pursuant
to Section 401 of Regulation S-K, promulgated under the Securities Act of 1933.
The undersigned's Questionnaire furnished to the Company and Maxim and annexed
as Exhibit B hereto is true and accurate in all respects. The undersigned
represents and warrants that:

                                      -2-
<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

                  (a) he is not subject to or a respondent in any legal action
for, any injunction, cease-and-desist order or order or stipulation to desist or
refrain from any act or practice relating to the offering of securities in any
jurisdiction;
                  (b) he has never been convicted of or pleaded guilty to any
crime (i) involving any fraud or (ii) relating to any financial transaction or
handling of funds of another person, or (iii) pertaining to any dealings in any
securities and he is not currently a defendant in any such criminal proceeding;
and

                  (c) he has never been suspended or expelled from membership in
any securities or commodities exchange or association or had a securities or
commodities license or registration denied, suspended or revoked.

9.  The undersigned has full right and power, without violating any agreement by
which he is bound, to enter into this letter agreement and to serve as a
Director of the Company.

10.  The undersigned authorizes any employer, financial institution, or consumer
credit reporting agency to release to Maxim and its legal representatives or
agents (including any investigative search firm retained by Maxim) any
information they may have about the undersigned's background and finances
("Information"). Neither Maxim nor its agents shall be violating the
undersigned's right of privacy in any manner in requesting and obtaining the
Information and the undersigned hereby releases them from liability for any
damage whatsoever in that connection.

11.  As used herein, (i) a "Business Combination" shall mean an acquisition by
merger, capital stock exchange, asset or stock acquisition, reorganization or
otherwise, of an operating business that provides services selected by the
Company; (ii) "Insiders" shall mean all officers, directors and stockholders of
the Company immediately prior to the IPO; (iii) "Insider Shares" shall mean all
of the shares of Common Stock of the Company owned by an Insider prior to the
IPO; and (iv) "IPO Shares" shall mean the shares of Common Stock issued in the
Company's IPO.

                                      -3-
<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

12.  The undersigned hereby agrees that any action, proceeding or claim against
the undersigned arising out of or relating in any way to this Agreement shall be
brought and enforced in the courts of the State of New York or the United States
District Court for the Southern District of New York, and irrevocably submits to
such jurisdiction, which jurisdiction shall be exclusive. The undersigned hereby
waives any objection to such exclusive jurisdiction and that such courts
represent an inconvenience forum.

                                                     By:  /s/ Edward B. Berger
                                                              Edward B. Berger

                                      -4-<PAGE>

                                                                  Exhibit 10.1.5

June 8, 2005

Healthcare Acquisition Corp.
2116 Financial Center
666 Walnut Street
Des Moines, IA  50309

Maxim Group LLC
405 Lexington Avenue
New York, NY  10174

RE:  INITIAL PUBLIC OFFERING

Gentlemen:

The undersigned stockholder, officer and/or director of Healthcare Acquisition
Corp. ("Company"), in consideration of Maxim Group LLC ("Maxim") entering into a
letter of intent ("Letter of Intent") to underwrite an initial public offering
of the securities of the Company ("IPO") and embarking on the IPO process,
hereby agrees as follows (certain capitalized terms used herein are defined in
paragraph 11 hereof):

1.  If the Company solicits approval of its stockholders of a Business
Combination, the undersigned will vote all Insider Shares owned by him in
accordance with the majority of the votes cast by the holders of the IPO Shares.

2.  In the event that the Company fails to consummate a Business Combination
within 18 months from the effective date ("Effective Date") of the registration
statement relating to the IPO (or 24 months under the circumstances described in
the prospectus relating to the IPO), the undersigned will take all reasonable
actions within his power to cause the Company to liquidate as soon as reasonably
practicable. In such event, the undersigned hereby waives any and all right,
title, interest or claim of any kind in or to any liquidating distributions by
the Company, including, without limitation, any distribution of the Trust Fund
(as defined in the Letter of Intent) as a result of such liquidation with
respect to his Insider Shares ("Claim") and hereby waives any Claim the
undersigned may have in the future as a result of, or arising out of, any
contracts or agreements with the Company and will not seek recourse against the
Trust Fund for any reason whatsoever. The undersigned agrees to indemnify and
hold harmless the Company against any and all loss, liability, claims, damage
and expense whatsoever (including, but not limited to, any and all legal or
other expenses reasonably incurred in investigating, preparing or defending
against any litigation, whether pending or threatened, or any claim whatsoever)
to which the Company may become subject as a result of any claim by any vendor
that is owed money by the Company for services rendered or products sold but
only to the extent necessary to ensure that such loss, liability, claim, damage
or expense does not reduce the amount in the Trust Fund (as defined in the
Letter of Intent).

<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

3.  In order to minimize potential conflicts of interest which may arise from
multiple affiliations, the undersigned agrees to present to the Company for its
consideration, and not to any other person or entity unless the opportunity is
rejected by the Company, those opportunities to acquire an operating company the
undersigned reasonably believes are suitable opportunity for the Company, until
the earlier of the consummation by the Company of a Business Combination, the
liquidation of the Company or until such time as the undersigned ceases to be an
officer or director of the Company, subject to any fiduciary obligations the
undersigned might have.

4.  The undersigned acknowledges and agrees that the Company will not consummate
any Business Combination which involves a company which is affiliated with any
of the Insiders unless the Company obtains an opinion from an independent
investment banking firm reasonably acceptable to Maxim that the business
combination is fair to the Company's stockholders from a financial perspective.

5.  Neither the undersigned, any member of the family of the undersigned, nor
any Affiliate of the undersigned will be entitled to receive and will not accept
any compensation for services rendered to the Company prior to the consummation
of the Business Combination; provided that the undersigned shall be entitled to
reimbursement from the Company for his out-of-pocket expenses incurred in
connection with seeking and consummating a Business Combination.

6.  Neither the undersigned, any member of the family of the undersigned, or any
Affiliate of the undersigned will be entitled to receive or accept a finder's
fee or any other compensation in the event the undersigned, any member of the
family of the undersigned or any Affiliate of the undersigned originates a
Business Combination.

7.  The undersigned will escrow his Insider Shares for the three-year period
commencing on the Effective Date subject to the terms of a Stock Escrow
Agreement which the Company will enter into with the undersigned and an escrow
agent acceptable to the Company.

8.  The undersigned agrees to be a Director of the Company until the earlier of
the consummation by the Company of a Business Combination or the liquidation of
the Company. The undersigned's biographical information furnished to the Company
and Maxim and attached hereto as Exhibit A is true and accurate in all respects,
does not omit any material information with respect to the undersigned's
background and contains all of the information required to be disclosed pursuant
to Section 401 of Regulation S-K, promulgated under the Securities Act of 1933.
The undersigned's Questionnaire furnished to the Company and Maxim and annexed
as Exhibit B hereto is true and accurate in all respects. The undersigned
represents and warrants that:

                                      -2-
<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

                  (a) he is not subject to or a respondent in any legal action
for, any injunction, cease-and-desist order or order or stipulation to desist or
refrain from any act or practice relating to the offering of securities in any
jurisdiction;
                  (b) he has never been convicted of or pleaded guilty to any
crime (i) involving any fraud or (ii) relating to any financial transaction or
handling of funds of another person, or (iii) pertaining to any dealings in any
securities and he is not currently a defendant in any such criminal proceeding;
and

                  (c) he has never been suspended or expelled from membership in
any securities or commodities exchange or association or had a securities or
commodities license or registration denied, suspended or revoked.

9.  The undersigned has full right and power, without violating any agreement by
which he is bound, to enter into this letter agreement and to serve as a
Director of the Company.

10.  The undersigned authorizes any employer, financial institution, or consumer
credit reporting agency to release to Maxim and its legal representatives or
agents (including any investigative search firm retained by Maxim) any
information they may have about the undersigned's background and finances
("Information"). Neither Maxim nor its agents shall be violating the
undersigned's right of privacy in any manner in requesting and obtaining the
Information and the undersigned hereby releases them from liability for any
damage whatsoever in that connection.

11.  As used herein, (i) a "Business Combination" shall mean an acquisition by
merger, capital stock exchange, asset or stock acquisition, reorganization or
otherwise, of an operating business that provides services selected by the
Company; (ii) "Insiders" shall mean all officers, directors and stockholders of
the Company immediately prior to the IPO; (iii) "Insider Shares" shall mean all
of the shares of Common Stock of the Company owned by an Insider prior to the
IPO; and (iv) "IPO Shares" shall mean the shares of Common Stock issued in the
Company's IPO.

                                      -3-
<PAGE>

Healthcare Acquisition Corp.                                        June 8, 2005
Maxim Group LLC

12. The undersigned hereby agrees that any action, proceeding or claim against
the undersigned arising out of or relating in any way to this Agreement shall be
brought and enforced in the courts of the State of New York or the United States
District Court for the Southern District of New York, and irrevocably submits to
such jurisdiction, which jurisdiction shall be exclusive. The undersigned hereby
waives any objection to such exclusive jurisdiction and that such courts
represent an inconvenience forum.

                                                  By: /s/ Wayne A. Schellhammer
                                                      -------------------------
                                                          Wayne A. Schellhammer

                                      -4-

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