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 Amendment No. 3 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 Amendment No. 3 jointly on behalf of each such party.
Date: February 4, 2019
| POLARIS VENTURE PARTNERS V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | * | |
| Managing Member | ||
| POLARIS VENTURE PARTNERS ENTREPRENEURS’ FUND V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | * | |
| Managing Member | ||
POLARIS VENTURE PARTNERS FOUNDERS’ FUND V, L.P. | ||
| By: Polaris Venture Management Co. V, L.L.C. | ||
| By: | * | |
| Managing Member | ||
POLARIS VENTURE PARTNERS SPECIAL FOUNDERS’ FUND V, L.P. | ||
| By: | Polaris Venture Management Co. V, L.L.C. | |
| By: | * | |
| Managing Member | ||
| POLARIS VENTURE MANAGEMENT CO. V, L.L.C. | ||
| By: | * | |
| Managing Member | ||
| JONATHAN A. FLINT | ||
| By: | * | |
| Jonathan A. Flint | ||
| TERRANCE G. MCGUIRE | ||
| By: | * | |
| Terrance G. McGuire | ||
| AMIR NASHAT | ||
| By: | * | |
| Amir Nashat | ||
| *By: | /s/ Max Eisenberg | |
| Name: | Max Eisenberg | |
| Attorney-in-Fact |
[This Exhibit A to Schedule 13D Amendment No. 3 was executed pursuant to Powers of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.]
