Board of Directors

Joel Ackerman

Joel Ackerman has been a director of the Company since November 1999. Mr. Ackerman is a private investor.  From January 1998 to September 2008, he served as a general partner of Warburg Pincus & Co. and a Managing Director of Warburg Pincus LLC. He is a director of Medical Staffing Network Holdings, Inc., a leading medical staffing company and provider of per diem nurse staffing services and Kindred Healthcare, Inc. a company operating long-term acute care hospitals, skilled nursing centers and contract rehabilitation services.

L. Dale Crandall

L. Dale Crandall has been a director of the Company since January 1, 2004. Mr. Crandall previously served in various management positions with Kaiser Foundation Health Plan, Inc. and Kaiser Foundation Hospitals, including President and Chief Operating Officer from March 2000 until his retirement in June 2002, and Senior Vice President, Finance and Administration, from June 1998 until March 2000. He is also a member of the boards of directors of UnionBanCal Corporation, a wholly-owned subsidiary of MUFG, whose primary subsidiary is Union Bank, N.A., Ansell Limited, a global provider of healthcare barrier protection products, Metavante Technologies, Inc., a provider of banking and payment technologies, Serena Software, Inc., an enterprise software company, Bridgepoint Education Inc., a provider of post-secondary education, and a Trustee of five funds in the Dodge and Cox family of mutual funds.

Lawrence N. Kugelman

Lawrence N. Kugelman has been a director of the Company since August 1992. He has been a director of
Arcadian Management Services, Inc., a company that owns and manages rural health care provider networks and Medicare health maintenance organizations, since July 2001, and a director since October 2002 of Valeant Pharmaceuticals International (formerly Valeant Pharmaceuticals, Inc.), a global, research-based pharmaceutical company that develops, manufactures, distributes and sells pharmaceutical, research and diagnostic products. Since 2003, he has been a Director of AccentCare, Inc., a company which provides in-home health care and support services. Mr. Kugelman has been a private investor and business consultant since October 1996.

Daniel N. Mendelson

Daniel N. Mendelson has been a director of the Company since May 2005. Mr. Mendelson is President and
Chief Executive Officer of Avalere Health, a strategic advisory company that provides guidance and syndicated research for clients in the healthcare industry, government and the not-for-profit sector. Prior to founding Avalere Health in 2000, he served as Associate Director for Health at the White House Office of Management and Budget in Washington, D.C. Mr. Mendelson is a director of PharMerica Corporation, a pharmaceutical services company serving patients in hospital and long-term care settings.

Rodman W. Moorhead, III

Rodman W. Moorhead, III has been a director of the Company since May 1997. Mr. Moorhead is a private
investor. In December 2006, he retired from Warburg Pincus LLC, a private equity and venture capital firm in New York, where he was a Managing Director and Senior Advisor and had been employed since 1973. From June 1998 to present he has served as a director of Scientific Learning Corporation, a computer-based special education training company.

Elizabeth E. Tallett

Elizabeth E. Tallett has been a director of the Company since March 1998. Ms. Tallett has been a Principal of Hunter Partners, LLC, which provides management services to developing life sciences companies, since July 2002. Ms. Tallett is also a director of IntegraMed America, Inc., a health services management company specializing in fertility and assisted reproductive technology, Meredith Corporation, a media and marketing company, Principal Financial Group, Inc., a global financial institution, and Varian, Inc., an analytical scientific instruments company.

Timothy T. Weglicki

Timothy T. Weglicki has been a director of the Company since August 2001. Mr. Weglicki is a Founding
Partner of ABS Capital Partners, a private equity fund located in Baltimore, Maryland. Mr.Weglicki has been with ABS since December 1993. Mr. Weglicki is a director of American Public Education, Inc., a leading provider of online post-secondary education focused primarily on serving the military and public service communities.

Allen F.Wise

Allen F.Wise became our Chief Executive Officer in January 2009. He has been a director of our Company since October 1996 and has been Chair of the Board since January 2005 and Executive Chair of the Board since December 2008. He was President and Chief Executive Officer of our Company from October 1996 to December 2004.