Exhibit 99.1
AGREEMENT
In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement on Schedule 13G relating to the Common Stock of Diadexus, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.
April 10, 2014
| BAKER BROS. ADVISORS LP By: Baker Bros. Advisors (GP) LLC, its general partner |
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| By: | /s/ Scott L. Lessing |
| | Name: Scott L. Lessing Title: President |
| BAKER BROS. ADVISORS (GP) LLC |
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| By: | /s/ Scott L. Lessing |
| | Name: Scott L. Lessing Title: President |
| /s/ Julian C. Baker | |
| Julian C. Baker | |
| | | |
| /s/ Felix J. Baker | |
| Felix J. Baker | |
| FBB Associates |
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| By: | /s/ Julian C. Baker |
| | Name: Julian C. Baker Title: Partner |