1. Division of Newborn Medicine, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania;
2. Division of Neonatology, Department of Pediatrics, Albert Einstein School of Medicine, Montefiore Medical Center, New York, New York;
3. Department of Social and Decision Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania; and
4. Division of Neonatology, Department of Pediatrics, College of Physicians and Surgeons, Columbia University, New York, New York