1. New York University School of Medicine, Bellevue Hospital Center, New York
2. Centers for Disease Control and Prevention, Atlanta, Georgia
3. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
4. University of South Florida, Tampa
5. Johns Hopkins University School of Medicine, Baltimore, Maryland
6. Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
7. University of Medicine and Dentistry of New Jersey, Newark
8. University of California, Los Angeles