1. Department of Pediatrics, Wayne State University, Detroit, Michigan
2. Department of Pediatrics, Women and Infants Hospital, Brown University, Providence, Rhode Island
3. Social, Statistical and Environmental Sciences Unit, RTI International, Research Triangle Park, North Carolina
4. Social, Statistical and Environmental Sciences Unit, RTI International, Rockville, Maryland
5. Department of Pediatrics, McGovern Medical School, the University of Texas Health Science Center at Houston
6. Department of Pediatrics, Indiana University School of Medicine, Indianapolis7Perinatal Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
7. Perinatal Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
8. Department of Pediatrics, University of Iowa, Iowa City
9. Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas
10. Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine and Lucile Packard Children’s Hospital, Palo Alto, California
11. Department of Pediatrics, University of California, Los Angeles
12. Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut
13. Department of Pediatrics, Indiana University School of Medicine, Indianapolis
14. Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, the Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
15. Department of Pediatrics, University at Buffalo, Buffalo, New York
16. Department of Pediatrics, Rainbow Babies and Children’s Hospital, Case Western Reserve University, Cleveland, Ohio
17. Division of Neonatology, University of Alabama at Birmingham
18. University of New Mexico Health Sciences Center, Albuquerque
19. Department of Pediatrics, Nationwide Children’s Hospital–The Ohio State University, Columbus
20. Department of Pediatrics, Emory University School of Medicine, Children’s Healthcare of Atlanta, Atlanta, Georgia
21. Department of Pediatrics, University of Michigan, Ann Arbor
22. Department of Pediatrics, Duke University, Durham, North Carolina
23. Department of Pediatrics, Children’s Mercy Hospital and University of Missouri Kansas City School of Medicine, Kansas City
24. Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland