1) AMERICAN HOSPITAL ASSOCIATION

2) BAYCARE HEALTH SYSTEM

3) BLUE CROSS BLUE SHIELD OF MASSACHUSETTS

4) BOSTON MEDICAL CENTER

5) CAMBIA HEALTH SOLUTIONS (FORMERLY KNOWN AS THE REGENCE GROUP)

6) DAVITA INC.

7) FOUNTAIN HOUSE

8) GE HEALTHCARE

9) GENEDX, LLC

10) GREATER NEW YORK HOSPITAL ASSOCIATION

11) HPA MANAGEMENT GROUP INC.

12) KAROO HEALTH

13) MOUNT SINAI HOSPITALS GROUP, INC

14) QUEST DIAGNOSTICS INCORPORATED

15) THE GUARDIAN LIFE INSURANCE COMPANY OF AMERICA