Exhibit 99.1
AGREEMENT
Pursuant to Rule13d-1(k)(1) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13G/A is being filed on behalf of each of the undersigned.
| Dated: February 14, 2014 | VENROCK ASSOCIATES | |||||
| By: A General Partner | ||||||
| By: | /s/ David L. Stepp | |||||
| Authorized Signatory | ||||||
| VENROCK ASSOCIATES II, L.P. | ||
| By: A General Partner | ||
| By: | /s/ David L. Stepp | |
| Authorized Signatory | ||
| VENROCK ENTREPRENEURS FUND, L.P. | ||
| By its General Partner Venrock Management, LLC | ||
| By: | /s/ David L. Stepp | |
| Authorized Signatory | ||
VENROCK ASSOCIATES V, L.P. By: Venrock Management V, LLC | VR MANAGEMENT, LLC | |||||||
| Its General Partner | ||||||||
| By: | /s/ David L. Stepp | By: | /s/ David L. Stepp | |||||
| Authorized Signatory | Authorized Signatory | |||||||
VENROCK MANAGEMENT V, LLC | VENROCK MANAGEMENT, LLC | |||||||
| By: | /s/ David L. Stepp | By: | /s/ David L. Stepp | |||||
| Authorized Signatory | Authorized Signatory | |||||||
VENROCK PARTNERS V, L.P. By: Venrock Partners Management V, LLC | VENROCK HEALTHCARE CAPITAL PARTNERS, L.P. By its General Partner VHCP Management, LLC | |||||||
| Its General Partner | ||||||||
| By: | /s/ David L. Stepp | By: | /s/ David L. Stepp | |||||
| Authorized Signatory | Authorized Signatory | |||||||
| VENROCK PARTNERS MANAGEMENT V, LLC | VHCP CO-INVESTMENT HOLDINGS, LLC By its Manager VHCP Management, LLC | |||||||
| By: | /s/ David L. Stepp | By: | /s/ David L. Stepp | |||||
| Authorized Signatory | Authorized Signatory | |||||||
| VHCP MANAGEMENT, LLC | ||||||||
| By: | /s/ David L. Stepp | |||||||
| Authorized Signatory | ||||||||
