1. Baylor College of Medicine and the Michael E. DeBakey Medical Center; Houston Texas
2. Tufts Medical Center; Boston Massachusetts
3. University of Pittsburgh; Pittsburgh Pennsylvania
4. University of California; San Francisco
5. Baylor College of Medicine; Houston Texas
6. Indiana University of Pennsylvania; Indiana
7. Memorial Hospital of Rhode Island and Alpert Medical School of Brown University; Pawtucket
8. University of Maryland School of Medicine; Baltimore
9. Ohio State University; Columbus
10. University of Arizona; Tucson
11. University of Texas MD Anderson Cancer Center; Houston