1. Division of Perinatal-Neonatal Medicine, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas
2. Division of Neonatal-Perinatal Medicine, Department of Pediatrics, School of Medicine, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus, Aurora, Colorado
3. Division of Perinatal-Neonatal Medicine, Department of Pediatrics, Children's Mercy-Kansas City, Kansas City, Missouri
4. Division of Neonatology, Department of Pediatrics, Children's of Alabama, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
5. Division of Neonatology and Pulmonary Biology, Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
6. Division of Neonatal/Perinatal Medicine, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
7. Division of Neonatology, Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington
8. Division of Neonatology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
9. Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana