1. Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center, Houston and Children’s Memorial Hermann Hospital, Houston
2. Department of Pediatrics, Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia
3. Social, Statistical, and Environmental Sciences Unit, RTI International, Research Triangle Park, North Carolina
4. Department of Pediatrics, Nationwide Children’s Hospital, The Ohio State University College of Medicine, Columbus
5. Department of Pediatrics, University of Iowa, Iowa City
6. Division of Neonatology, University of Alabama at Birmingham
7. Department of Pediatrics, Duke University, Durham, North Carolina
8. Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York
9. Department of Pediatrics, Wayne State University, Detroit, Michigan
10. Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
11. Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio
12. Division of Neonatal and Developmental Medicine, Department of Pediatrics, Lucile Packard Children’s Hospital, Stanford University School of Medicine, Palo Alto, California
13. Department of Pediatrics, Emory University School of Medicine, Children’s Healthcare of Atlanta, Atlanta, Georgia
14. Social, Statistical and Environmental Sciences Unit, RTI International, Rockville, Maryland
15. Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas
16. Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City
17. Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque
18. Department of Pediatrics, Rainbow Babies & Children’s Hospital, Case Western Reserve University, Cleveland, Ohio
19. Department of Pediatrics, UCLA (University of California, Los Angeles)
20. Department of Pediatrics, Women & Infants Hospital, Brown University, Providence, Rhode Island
21. Department of Pediatrics, Indiana University School of Medicine, Indianapolis
22. Centers for Disease Control and Prevention, Atlanta, Georgia
23. Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH), Bethesda, Maryland
24. Office of Research, George Mason University College of Health and Human Services, Fairfax, Virginia