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. 4 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. 4 jointly on behalf of each such party.
Date: February 12, 2020
| 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/ Lauren Crockett | |
| Name: | Lauren Crockett | |
| Attorney-in-Fact |
[This Exhibit A to Schedule 13D Amendment No. 4 was executed pursuant to Powers of Attorney. Note that copies of the applicable Powers of Attorney for the Reporting Persons other than Nashat are already on file with the appropriate agencies. The Power of Attorney of Amir Nashat is attached hereto as Exhibit E.]