Exhibit 2
JOINT FILING AGREEMENT
The undersigned hereby agree that the foregoing Statement on Schedule 13G,
dated January 4, 2005, is being filed with the Securities and Exchange
Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k).
Dated: January 4, 2005
HBM BioVentures (Cayman) Ltd.
/s/ Xxxx Xxxxxx
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By: Xxxx Xxxxxx
Its: Chairman and Managing Director
HBM BioVentures AG
/s/ Xxxx Xxxxxx as Attorney in Fact
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By: Xxxx Xxxxxx
Its: Attorney-in-Fact*
* Pursuant to Power of Attorney dated December 22, 2004, filed as Exhibit 3 to
this filing.
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