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| 07/23/2007 | 4 | Statement of changes in beneficial ownership of securities | ALCORN GEORGE A |    |
| 07/23/2007 | 4 | Statement of changes in beneficial ownership of securities | Jacobs Terrence S |    |
| 07/23/2007 | 4 | Statement of changes in beneficial ownership of securities | SWOVELAND JEFFREY C |    |
| 07/17/2007 | 4/A | Amendment to a previously filed 4 | Rockov Kolja |    |
| 07/17/2007 | 4/A | Amendment to a previously filed 4 | Rockov Kolja |    |
| 07/16/2007 | 4 | Statement of changes in beneficial ownership of securities | Rockov Kolja |    |
| 07/12/2007 | 4 | Statement of changes in beneficial ownership of securities | Rockov Kolja |    |
| 04/12/2007 | 4 | Statement of changes in beneficial ownership of securities | RIPLEY CHARLENE A |    |
| 02/07/2007 | 4 | Statement of changes in beneficial ownership of securities | Walker Arden Jr |    |
| 01/24/2007 | 4 | Statement of changes in beneficial ownership of securities | Linn Michael C |    |
| 01/19/2007 | 4 | Statement of changes in beneficial ownership of securities | Keddie Roland P |    |
| 01/19/2007 | 4 | Statement of changes in beneficial ownership of securities | Lopus Thomas A |    |
| 01/19/2007 | 4 | Statement of changes in beneficial ownership of securities | Anderson Lisa D |    |
| 01/19/2007 | 4 | Statement of changes in beneficial ownership of securities | Rockov Kolja |    |
| 01/19/2007 | 4 | Statement of changes in beneficial ownership of securities | Linn Michael C |    |
| 12/20/2006 | 4 | Statement of changes in beneficial ownership of securities | Ellis Mark E |    |
| 12/08/2006 | 4 | Statement of changes in beneficial ownership of securities | Anderson Lisa D |    |
| 12/08/2006 | 4 | Statement of changes in beneficial ownership of securities | Lopus Thomas A |    |
| 12/08/2006 | 4 | Statement of changes in beneficial ownership of securities | Rockov Kolja |    |
| 12/08/2006 | 4 | Statement of changes in beneficial ownership of securities | Keddie Roland P |    |
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