1. Pediatric Heart Lung Center, Department of Pediatrics, Children’s Hospital Colorado
2. Department of Biostatistics and Informatics
3. Section of Neonatal-Perinatal Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana
4. Perinatal Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
5. Department of Neonatology, Duke University Medical School, Durham, North Carolina; and
6. Division of Neonatology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
7. Department of Epidemiology
8. Section of Critical Care, and
9. Section of Pulmonary Medicine, School of Public Health, University of Colorado Denver Anschutz Medical Center, Aurora, Colorado