Exhibit 1
AGREEMENT REGARDING JOINT FILING OF SCHEDULE 13G
Pursuant to Rule13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of securities of the Issuer.
Date: November 27, 2019
| OSAGE UNIVERSITY PARTNERS III, LP | ||||
| By: | OSAGE UNIVERSITY GP III, LLC | |||
| Its General Partner | ||||
| By: | /s/ Robert S. Adelson | |||
| Robert S. Adelson, Managing Member | ||||
| OSAGE UNIVERSITY GP III, LLC | ||||
| By: | /s/ Robert S. Adelson | |||
| Robert S. Adelson, Managing Member | ||||
/s/ William T. Harrington | ||||
| William T. Harrington | ||||
/s/ Marc A. Singer | ||||
| Marc A. Singer | ||||
/s/ Robert S. Adelson | ||||
| Robert S. Adelson | ||||
