EXHIBIT 99.1
JOINT FILING AGREEMENT
AUGUST 10, 2006
Pursuant to and in accordance with the Securities Exchange Act of
1934, as amended, and the rules and regulations thereunder, each party hereto
hereby agrees to the joint filing, on behalf of each of them, of any filing
required by such party under Section 13 or Section 16 of the Exchange Act or any
rule or regulation thereunder (including any amendment, supplement, and/or
exhibit thereto) with the Securities and Exchange Commission (and, if such
security is registered on a national securities exchange or national securities
association, also with the exchange or association), and further agrees to the
filing and/or incorporation by reference of this Joint Filing Agreement as an
exhibit thereto. This Joint Filing Agreement shall remain in full force and
effect until revoked by any party hereto in a signed writing provided to each
other party hereto, and then only with respect to such revoking party.
IN WITNESS WHEREOF, each party hereto, being duly authorized, has
caused this Joint Filing Agreement to be executed and effective as of the date
first written above.
CPMG, INC.
By: /s/ Xxxx XxXxxxxx
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Name: Xxxx XxXxxxxx
Title: President
Date: August 10, 2006
CARDINAL INVESTMENT COMPANY, INC. PROFIT SHARING PLAN
By: /s/Xxxxxx Xxxxx
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Name: Xxxxxx Xxxxx
Title: Vice President
Date: August 10, 0000
XXXXXX X. XXXX III
By: /s/ Xxxxxx Xxxxx
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Name: Xxxxxx Xxxxx
Title: Attorney-in-Fact
Date: August 10, 2006
