| Name and Title                                                                   |         | Date           |   |
|----------------------------------------------------------------------------------|--------------|----------------|--------|
|                                                                             |         |           |   |
| /s/ PAUL H. FISCHER, PH.D.                                             |         | March 11, 2011 |   |
| Paul H. Fischer, Ph.D.                                                           |         |           |   |
| President, Chief Executive Officer and Director                                  |         |           |   |
|                                                                             |         |           |   |
| /s/ DOUGLAS J. SWIRSKY                                            |         | March 11, 2011 |   |
| Douglas J. Swirsky                                                               |         |           |   |
| Senior Vice President, Chief Financial Officer,Treasurer and Corporate Secretary |         |           |   |
|                                                                             |         |           |   |
| /s/ WAYNE T. HOCKMEYER, PH.D.                                          |         | March 8, 2011  |   |
| Wayne T. Hockmeyer, Ph.D.                                                        |         |           |   |
| Director                                                                         |         |           |   |
|                                                                             |         |           |   |
| /s/ ZOLA P. HOROVITZ, PH.D.                                            |         | March 8, 2011  |   |
| Zola P. Horovitz, Ph.D.                                                          |         |           |   |
| Director                                                                         |         |           |   |
|                                                                             |         |           |   |
| /s/ WILLIAM N. KELLEY, M.D.                                            |         | March 6, 2011  |   |
| William N. Kelley, M.D.                                                          |         |           |   |
| Director                                                                         |         |           |   |
|                                                                             |         |           |   |
| /s/ KEVIN M. ROONEY                                                    |         | March 8, 2011  |   |
| Kevin M. Rooney                                                                  |         |           |   |
| Director                                                                         |         |           |   |
|                                                                             |         |           |   |
|                                                                             |         | March _, 2011  |   |
| Joshua Ruch                                                                 |         |           |   |
| Director                                                                         |         |           |   |
|                                                                             |         |           |   |
| /s/ MARC R. SCHNEEBAUM                                                 |         | March 8, 2011  |   |
| Marc R. Schneebaum                                                               |         |           |   |
| Director                                                                         |    |           |   |

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