1. Duke University Medical Center, Durham, North Carolina
2. Duke Clinical Research Institute, Durham, North Carolina
3. The University of Texas MD Anderson Cancer Center, Houston
4. Tufts Medical Center, Boston, Massachusetts
5. Johns Hopkins University School of Medicine, Baltimore, Maryland
6. University of Alabama at Birmingham
7. San Gerardo Hospital, Monza, Italy
8. Brody School of Medicine, East Carolina University, Greenville, North Carolina
9. University of Massachusetts Medical School, Worcester
10. Carolinas Medical Center, Charlotte, North Carolina
11. Denver Health, Denver, Colorada
12. Wayne State University, Detroit, Michigan
13. Hospital Clinic–IDIBAPS, University of Barcelona, Barcelona, Spain
14. Albert Einstein College of Medicine, Bronx, New York
15. David Geffen School of Medicine, University of California at Los Angeles
16. University of Nebraska Medical Center, Omaha
17. Greenville Health System, Greenville, South Carolina
18. Beaumont Health System, Royal Oak, Michigan
19. Medical University of South Carolina, Charleston
20. Henry Ford Health System, Detroit, Michigan