1. Division of Newborn Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
2. Division of Neonatal-Perinatal Medicine, Department of Pediatrics, Saint Louis University School of Medicine, St. Louis, Missouri
3. Sunflower Neonatology Associates, Overland Park, Kansas
4. Department of Neonatology, Saint Francis Medical Center, Cape Girardeau, Missouri