Investors 
Alta Partners*
Arcus Ventures
Biogen Idec New Ventures
CIDC/Grand Cathay Venture Capital
CMEA Ventures
Cogene Biotech Ventures
Eli Lilly and Company
H&Q Capital Management
Innovis Investments
InterWest Partners*
Mithra Group
Mitsubishi UFJ Capital
Montgomery & Co.
MPM Capital*
Nextech Venture
OrbiMed Advisors, LLC
Pequot
Red Abbey Venture Partners
Ridgeback Capital
RiverVest Venture Partners
The Caisse de dépôt et placement du Québec
TPG Ventures*
U.S. Venture Partners
Ventures West*
Vulcan Capital*
* board representation
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