1. Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas;
2. Kapiolani Women and Children’s Hospital, Honolulu, Hawaii;
3. University of Mississippi Medical Center, Jackson, Mississippi;
4. RTI International, Research Triangle Park, North Carolina;
5. Department of Pediatrics, University of Louisville, Louisville, Kentucky;
6. College of Health and Human Services, George Mason University, Fairfax, Virginia;
7. Department of Pediatrics, Section of Neonatology, Tulane University, New Orleans, Louisiana;
8. Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio;
9. Health Sciences Center, University of New Mexico, Albuquerque, New Mexico;
10. Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware;
11. Environmental Influences on Child Health Outcomes Program, National Institutes of Health, Bethesda, Maryland;
12. West Virginia University Medical Center, Morgantown, West Virginia;
13. Department of Pediatrics, College of Medicine, University of South Carolina, Columbia, South Carolina;
14. University of Vermont Medical Center, Burlington, Vermont; and
15. Children’s Hospital at Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire