1. METRC Coordinating Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
2. Carolinas Medical Center, Charlotte, North Carolina
3. University of Maryland R Adams Cowley Shock Trauma Center, Baltimore
4. MetroHealth Medical Center, Cleveland, Ohio
5. Vanderbilt University Medical Center, Nashville, Tennessee
6. Inova Fairfax Hospital, Falls Church, Virginia
7. Johns Hopkins University School of Medicine, Baltimore, Maryland
8. Denver Health and Hospital Authority, Denver, Colorado
9. Florida Orthopedic Institute/Tampa General Hospital, Tampa
10. Hennepin County Medical Center/Regions Hospital, Minneapolis, Minnesota
11. University of Texas Health Science Center at Houston
12. Methodist Hospital, Indianapolis, Indiana
13. Orthopaedic Associates of Michigan, Grand Rapids
14. Wake Forest University Baptist Medical Center, Winston-Salem, North Carolina