1. Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
2. Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
3. Division of Neonatology, Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
4. Respiratory Care, Nursing and Clinical Care Services, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
5. Department of Anesthesiology and Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
6. Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Yale School of Medicine, Yale University, New Haven, Connecticut
7. Department of Pediatrics, School of Medicine, University of Washington, Seattle, Washington
8. Division of Neonatology, Department of Pediatrics, University of Nebraska Medical Center, Omaha, Nebraska
9. Penn State Children’s Hospital and College of Medicine, Pennsylvania State University, Hershey, Pennsylvania
10. Department of Pediatrics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
11. Department of Pediatrics
12. Research Centre, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada
13. Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta