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) CITY OF MONROE, LOUISIANA

7) CURIUM US LLC

8) FRANCISCAN MISSIONARIES OF OUR LADY HEALTH SYSTEM

9) GENWORTH NORTH AMERICA CORPORATION

10) GEORGIA HOSPITAL ASSOCIATION, INC.

11) HAYMARKET CENTER

12) JOHNSON & JOHNSON SERVICES INC

13) MARY BIRD PERKINS CANCER CENTER

14) PHOEBE PUTNEY HEALTH SYSTEM

15) RENALOGIC, INC.

16) SPECIALTY CARE MANAGEMENT, LLC

17) THE UNIVERSITY OF TEXAS SYSTEM

18) UNIVERSITY OF CHICAGO

19) WELLSTAR HEALTH SYSTEM INC.

20) WILLIS NORTH AMERICA INC

21) ZERO - THE END OF PROSTATE CANCER