Thomas Weisel Partners Group Inc.

Cliff is a Managing Partner in the Private Equity Group at Thomas Weisel Partners and Manager of Thomas Weisel Global Growth Partners. Previously, he spent six years with BancBoston Capital, where he was responsible for secondary purchases of private equity portfolios. Prior to joining BancBoston Capital, Cliff spent six years at Abbott Capital Management, an investment management firm specializing in private equity investments. Prior to his tenure at Abbott Capital Management, Cliff was with Venture Economics, an industry research firm focused on the private equity market. He received a Bachelor of Science degree from Babson College and a Master of Business Administration degree from The F.W. Olin Graduate School at Babson College.

Dick is a general partner of KVP. He has been investing in and advising private companies for more than 30 years. Prior to KVP, Dick was Vice President and the first CFO at Portal Software (1997 - 1999), which grew from 10 to 120 employees during his tenure. Prior to Portal Software, he served as CFO for Fusion Medical Technologies, and was responsible for all aspects of the company's IPO. Before Fusion, Mr. Spalding was the head of West Coast investment banking for Alex. Brown and Sons, which included supervision of the firm's Japan office. Dick was with Alex. Brown between 1991 and 1996, during which time he and Jim were partners. Mr. Spalding joined Alex. Brown, after a fourteen-year tenure at Brobeck, Phleger & Harrison, where he co-founded the firm's Palo Alto office, which grew from 2 to over 100 lawyers. He specialized in representing biotechnology companies, including IDEC Pharmaceuticals, Inc., Gen Pro, Inc., and Xoma, Inc., among others. He was previously an observer to the board at Align Technology [NASDAQ: ALGN], and currently serves as an observer to the board at Kai Pharmaceuticals and RoxRo Pharma and is a director at Emphasys Medical and SpinalMotion. Dick is a co-founder of SpinalMotion. He holds an A.B. with honors from Harvard College, and a J.D. with honors from Columbia Law School.

Michael G. McCaffery, age 53, is the Chief Executive Officer of Makena Capital Management. From 2000 to 2006, Mr. McCaffery was President and CEO of the Stanford Management Company (SMC), which was established in 1991 to manage Stanford University's financial and real estate investments. Previous to joining SMC, Mr. McCaffery was President and Chief Executive Officer of Robertson Stephens Investment Bankers from January 1993 to December 1999, and also served as Chairman from January 2000 to December 2000. Mr. McCaffery is a director of the Lucile Salter Packard Children's Hospital, Thomas Weisel Partners Group, Inc., Western Technology Ventures, Savvian, LLC and RS Investment Trust, and is a member of the Advisory Boards of Accel Ventures, Silver Lake Partners and Stanford University's Graduate School of Business. Mr. McCaffery was elected to the Board of Directors in 2003, and his current term expires in 2009.