1. Duke Clinical Research Institute, Durham, North Carolina
2. University of Florida College of Medicine–Jacksonville
3. University of Miami Miller School of Medicine, Miami, Florida
4. University of Alabama–Birmingham
5. Duke University Medical Center, Durham, North Carolina
6. Kings County Hospital, Brooklyn, New York
7. Wayne State University, Detroit, Michigan
8. University of Florida Health Shands Hospital, Gainesville
9. Memorial Hospital South Bend, South Bend, Indiana
10. University of Texas Medical Branch, Galveston
11. Columbia University, New York, New York
12. University of Minnesota Amplatz Children’s Hospital, Minneapolis
13. Brookdale University Hospital, Brooklyn, New York
14. University of California–San Diego Medical Center
15. University of Louisville, Louisville, Kentucky
16. Children's Hospital of Orange County, Orange, California
17. Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
18. University of Virginia, Charlottesville
19. Sant’Anna Hospital, Turin, Italy