 | | | | | | Name : | John P. Walker | | Title : | Chairman of the Board | | Since: | 07/2004 |
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| | | Name : | Corey S. Goodman | | Title : | President, Chief Executive Officer, Director | | Since: | 09/2001 |
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| | | Name : | Marlene F. Perry | | Title : | Senior Vice President - Human Resources and Facilities | | Since: | 07/2004 |
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| | | Name : | Michael G. Kelly | | Title : | Senior Vice President - Research and Development | | Since: | 01/2003 |
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| | | Name : | Jeffrey S. Farrow | | Title : | Vice President - Finance, Chief Accounting Officer | | Since: | 07/01/2007 |
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| | | Name : | George F. Fraley | | Title : | Vice President - Legal Affairs, Associate General Counsel | | Since: | 06/28/2007 |
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| |  | | | | | 2007 | | | | 1st March 2007 | | 8th May 2007 | | 7th August 2007 | | 6th November 2007 |
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