Exhibit A

AGREEMENT REGARDING THE JOINT FILING OF

SCHEDULE 13G

The undersigned hereby agree as follows:

(i) Each of them is individually eligible to use the Schedule 13G to which this Exhibit is attached, and such Schedule 13G is filed on behalf of each of them; and

(ii) Each of them is responsible for the timely filing of such Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

Dated: August 13, 2020	Bain Capital Life Sciences Fund II, L.P.
	By:	Bain Capital Life Sciences Investors II, LLC
		its general partner
	By:	Bain Capital Life Sciences Investors, LLC
		its manager
	By:	/s/ Jeffrey Schwartz
		Name:	Jeffrey Schwartz
		Title:	Managing Director
	BCIP Life Sciences Associates, LP
	By:	Boylston Coinvestors, LLC
		its general partner
	By:	/s/ Jeffrey Schwartz
		Name:	Jeffrey Schwartz
		Title:	Authorized Signatory