Exhibit A JOINT FILING AGREEMENT
Exhibit A
JOINT FILING AGREEMENT
The undersigned agree that Schedule 13G, dated December 15, 2008, relating to the Common Stock of SPPI shall be filed on behalf of the undersigned.
Dated: December 15, 2008
BIOTECHNOLOGY VALUE FUND, L.P. |
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By: |
BVF Partners, L.P., its general partner |
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By: |
BVF Inc., its general partner |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |
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BIOTECHNOLOGY VALUE FUND II, L.P. |
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By: |
BVF Partners, L.P., its general partner |
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By: |
BVF Inc., its general partner |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |
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BVF INVESTMENTS, L.L.C. |
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By: |
BVF Partners, L.P., its manager |
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By: |
BVF Inc., its general partner |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |
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INVESTMENT 10, L.L.C. |
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By: |
BVF Partners, L.P., its investment manager |
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By: |
BVF Inc., its general partner |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |
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BVP PARTNERS L.P. |
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By: |
BVF Inc., its general partner |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |
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BVF INC. |
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By: |
/s/ Xxxx X. Xxxxxxx |
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Xxxx X. Xxxxxxx, President |