Exhibit A
JOINT FILING STATEMENT
I, the undersigned, hereby express my agreement that the attached Schedule 13D/A (and any amendments thereto) relating to the Common Stock of Tesaro, Inc. is filed on behalf of each of the undersigned.
INTERWEST PARTNERS X, L.P.
| By: InterWest Management Partners X, LLC | ||
| Its: General Partner | ||
| By: | /s/ W. Stephen Holmes III | |
| W. STEPHEN HOLMES III | ||
| Managing Director | ||
| INTERWEST MANAGEMENT PARTNERS X, LLC | ||
| By: | /s/ W. Stephen Holmes III | |
| W. STEPHEN HOLMES III | ||
| Managing Director | ||
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Philip T. Gianos |
/s/ W. Stephen Holmes III |
| W. Stephen Holmes III |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Nina Kjellson |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Gilbert H. Kliman |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Arnold L. Oronsky |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Douglas A. Pepper |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Bruce A. Cleveland |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Khaled A. Nasr |
/s/ Karen A. Wilson |
| Karen A. Wilson, Attorney-in-Fact for Keval Desai |
19.
