1. Department of Pediatrics, University of Alabama at Birmingham, Birmingham
2. Statistics and Epidemiology Unit, RTI International, Research Triangle Park, North Carolina
3. Statistics and Epidemiology Unit, RTI International, Rockville, Maryland
4. Department of Pediatrics, University of Iowa, Iowa City
5. Nationwide Children’s Hospital, Department of Pediatrics, The Ohio State University, Columbus
6. Children’s Healthcare of Atlanta, Grady Memorial Hospital, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia
7. Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas
8. Women and Infants’ Hospital, Department of Pediatrics, Brown University, Providence, Rhode Island
9. Division of Neonatal and Developmental Medicine, Lucile Packard Children’s Hospital, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California
10. Department of Pediatrics, Duke University, Durham, North Carolina
11. University of Rochester School of Medicine and Dentistry, Rochester, New York
12. Department of Pediatrics, Wayne State University, Detroit, Michigan
13. The Children’s Hospital of Philadelphia, Department of Pediatrics, University of Pennsylvania, Philadelphia
14. Rainbow Babies and Children’s Hospital, Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
15. Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
16. Department of Global and Community Health, George Mason University, Fairfax, Virginia