CUSIP No. 15708Q105
Exhibit A
AGREEMENT REGARDING THE JOINT FILING OF
SCHEDULE 13D
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 jointly on behalf of each such party.
Date: April 21, 2014
| POLARIS VENTURE PARTNERS V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | /s/ John Gannon | |
Authorized Signatory | ||
| POLARIS VENTURE PARTNERS ENTREPRENEURS’ FUND V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | /s/ John Gannon | |
Authorized Signatory | ||
POLARIS VENTURE PARTNERS FOUNDERS’ FUND V, L.P. | ||
| By: Polaris Venture Management Co. V, L.L.C. | ||
| By: | /s/ John Gannon | |
Authorized Signatory | ||
CUSIP No. 15708Q105
| POLARIS VENTURE PARTNERS SPECIAL FOUNDERS’ FUND V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | /s/ John Gannon | |
Authorized Signatory | ||
| POLARIS VENTURE MANAGEMENT CO. V, L.L.C. | ||
| By: | /s/ John Gannon | |
Authorized Signatory | ||
| JONATHAN A. FLINT | ||
| By: | /s/ Jonathan A. Flint | |
| Jonathan A. Flint | ||
| TERRANCE G. MCGUIRE | ||
| By: | /s/ Terrance G. McGuire | |
| Terrance G. McGuire | ||
