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Charles G. Berg has been one of our directors since March 2007. Since January 2007, Mr. Berg has been a senior advisor to Welsh, Carson, Anderson & Stowe, a private equity firm. From April 1998 to July 2004, Mr. Berg held various executive positions with Oxford Health Plans, Inc. (Oxford) which included chief executive officer from November 2002 to July 2004 when Oxford was acquired by UnitedHealth Group, president and chief operating officer from March 2001 to November 2002 and executive vice president, medical delivery from April 1998 to March 2001. From July 2004 to September 2006, Mr. Berg served as an executive of UnitedHealth Group and was primarily responsible for integrating the Oxford business. | 