1. Mayo Clinic, Rochester, Minnesota
2. Duke Clinical Research Institute, Durham, North Carolina
3. Denver VA Medical Center, Denver, Colorado
4. University of Florida, Jacksonville
5. University of Colorado, Denver
6. Massachusetts General Hospital, Boston
7. Cleveland Clinic, Cleveland, Ohio
8. Duke University Medical Center, Durham, North Carolina
9. University of California, San Francisco
10. Baylor Scott & White Health, Plano, Texas