1. Cedars-Sinai Medical Center, Los Angeles
2. Massachusetts General Hospital, Boston
3. University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC
4. University of Chicago Medical Center, Chicago
5. The Ohio State University Wexner Medical Center, Columbus, OH
6. Beth Israel Deaconess Medical Center, Boston
7. UMass Memorial Medical Center, Worcester, MA
8. University of South Florida, Tampa, FL
9. Baylor College of Medicine and Texas Children’s Hospital, Houston
10. University of California at San Francisco, San Francisco
11. Miami Valley Hospital, Dayton, OH
12. Sharp Mary Birch Hospital for Women and Newborns, San Diego, CA
13. Torrance Memorial Medical Center, Torrance, CA
14. University of Utah Medical Center, Salt Lake City, UT
15. Lehigh Valley Health Network, Allentown, PA
16. Tufts Medical Center, Boston
17. Newton-Wellesley Hospital, Newton, MA
18. Johns Hopkins Medical Center, Baltimore
19. NorthShore University HealthSystem, Evanston, IL
20. MedStar Health Research Institute, Washington, DC