EXHIBIT 3
JOINT FILING AGREEMENT
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13D to evidence the agreement of the below-named parties, in accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule 13D and any amendments thereto jointly on behalf of each such party.
The execution and filing of this agreement shall not be construed as an admission that the below-named parties are a group, or have agreed to act as a group.
Dated: May 1, 2012
Zeneca Inc. |
| Zeneca Holdings Inc. | ||||
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By: | /s/ Stephen F. Mohr |
| By: | /s/ Stephen F. Mohr | ||
| Name: | Stephen F. Mohr |
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| Name: | Stephen F. Mohr |
| Title: | President |
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| Title: | President |
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AstraZeneca Holdings BV |
| AstraZeneca Treasury Limited | ||||
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By: | /s/ J.A.M. van Opdorp |
| By: | /s/ Adrian Kemp | ||
| Name: | J.A.M. van Opdorp |
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| Name: | Adrian Kemp |
| Title: | Managing Director |
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| Title: | Secretary |
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AstraZeneca UK Limited |
| AstraZeneca Intermediate Holdings Limited | ||||
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By: | /s/ Adrian Kemp |
| By: | /s/ Claire-Marie O’Grady | ||
| Name: | Adrian Kemp |
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| Name: | Claire-Marie O’Grady |
| Title: | Secretary |
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| Title: | Secretary |
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AstraZeneca PLC |
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By: | /s/ Adrian Kemp |
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| Name: | Adrian Kemp |
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| Title: | Secretary |
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