Myrtle S. Potter has been a director of the Company since April 2004. Ms. Potter has been Chief Executive Officer of Chapman Properties, Inc., a real estate company, since September 2006. She has also served as a healthcare consultant and advisor specializing in corporate strategy and product development through her private consulting firm, Myrtle Potter and Company, LLC, since August 2005. At Genentech, Inc., Ms. Potter was President, Commercial Operations, from March 2004 to August 2005 and Executive Vice President, Commercial Operations and Chief Operating Officer from May 2000 to March 2004. Ms. Potter is also a director of ev3 Inc. and Medco Health Solutions, Inc.