1. College of Medicine, University of Arizona College of Medicine, Phoenix, Arizona, United States
2. United States Air Force, Phoenix, Arizona, United States
3. Neonatal Intensive Care Unit, Banner - University Medical Center Phoenix, Phoenix, Arizona, United States
4. MEDNAX/Arizona Neonatology, Phoenix, Arizona, United States
5. Department of Pediatrics, Creighton University School of Medicine, Phoenix, Arizona, United States