1) AMERICAN PORTABLE DIAGNOSTICS ASSOCIATION

2) AMERICAN SOCIETY FOR RADIATION ONCOLOGY

3) CATHOLIC HEALTH ASSOCIATION

4) CHILDREN'S NATIONAL MEDICAL CENTER

5) CITY OF HOPE MEDICAL CENTER

6) CURIUM US LLC

7) FRANCISCAN MISSIONARIES OF OUR LADY HEALTH SYSTEM

8) GENWORTH NORTH AMERICA CORPORATION

9) GEORGIA HOSPITAL ASSOCIATION, INC.

10) HAYMARKET CENTER

11) JOHNSON & JOHNSON SERVICES INC

12) MARY BIRD PERKINS CANCER CENTER

13) PHOEBE PUTNEY HEALTH SYSTEM

14) RENALOGIC, INC.

15) SPECIALTY CARE MANAGEMENT, LLC

16) THE UNIVERSITY OF TEXAS SYSTEM

17) UNIVERSITY OF CHICAGO

18) WELLSTAR HEALTH SYSTEM INC.

19) WILLIS NORTH AMERICA INC