1. Children’s National Medical Center, Washington, District of Columbia
2. University of California, Los Angeles, Los Angeles, California
3. State University of New York Downstate Medical Center, Brooklyn, New York
4. University of Vermont, Burlington, Vermont
5. Pacific Pediatrics, San Francisco, California
6. University of Florida Health Science Center, Jacksonville, Florida
7. University of Maryland Schools of Medicine and Public Health, College Park, Maryland
8. First Georgia Physicians Group, Peachtree City, Georgia