1. Centers for Disease Control and Prevention, Atlanta, GA
2. University of Maryland School of Medicine, Baltimore, MD
3. University of Vermont, Colchester, VT
4. Baylor College of Medicine, Houston, TX
5. University of Texas Southwestern Medical Center, Dallas, TX
6. Framingham Heart Study, Framingham, MA
7. Children’s Hospital and Harvard Medical School, Boston, MA
8. Emory University School of Medicine, Atlanta, GA