1. Massachusetts General Hospital (Boston)
2.University of California (San Francisco)
3. Brigham and Women’s Hospital (Boston)
4. Stanford University (Palo Alto, Calif.)
5. Duke University Hospital (Durham, N.C.)
6. Johns Hopkins University (Baltimore)
7. University of Michigan Health System (Ann Arbor)
8. University of Pennsylvania Health System (Philadelphia)
9. Mayo Clinic College of Medicine and Science (Rochester, Minn.)
10. NewYork-Presbyterian Hospital (New York City)
