1. University of Texas Health Science Center at Houston
2. University of California, Los Angeles
3. Yale University New Haven Connecticut
4. University of Michigan Ann Arbor
5. University of Utah Salt Lake City
6. Columbia University New York New York
7. Massachusetts General Hospital and Harvard University Boston Massachusetts
8. University of Pittsburgh Pittsburgh Pennsylvania
9. Hospital for Special Surgery New York New York
10. Medical University of South Carolina Charleston
11. Johns Hopkins University School of Medicine Baltimore Maryland
12. George Washington University Washington DC
13. Georgetown University Washington DC