1. Division of Neonatology, Department of Pediatrics, Le Bonheur Children's Hospital and the University of Tennessee Health Science Center, Memphis, Tennessee
2. Children's Hospital Colorado and University of Colorado School of Medicine, Aurora, Colorado
3. Nationwide Children's Hospital, Columbus, Ohio
4. Seattle Children's Hospital and University of Washington, Seattle, Washington
5. Department of Pediatrics, Children's Healthcare of Atlanta at Egleston, Emory University School of Medicine, Atlanta, Georgia
6. Children's Hospital of Philadelphia and University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
7. Department of Pediatrics, Children's Mercy Hospitals & Clinics, University of Missouri Kansas, Kansas City, Missouri
8. Department of Neonatology, Cook Children's Hospital, Fort Worth, Texas
9. Children's Hospital of Orange County and University of California Irvine, Orange, California
10. Children's Hospital Association, Lenexa, Kansas
11. Department of Pediatrics, Ann & Robert H Lurie Children's Hospital of Chicago, Feinberg School of Medicine, Northwestern University, Chicago, Illinois