1. Division of Neonatology, Department of Pediatrics, Nemours Children's Hospital, University of Central Florida College of Medicine, Orlando, Florida
2. Division of Neonatology, Department of Pediatrics, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
3. Division of Neonatology, Department of Pediatrics, Mercy Kids Children's Hospital, University of Missouri School of Medicine, Springfield, Missouri
4. Department of Pediatrics, MetroHealth Medical Center affiliated with Case Western Reserve University, Cleveland, Ohio