1. From the Division of Neonatology, University of Miami, Miami; Department of Obstetrics-Gynecology, University of Mississippi, Jackson; Research Triangle Institute, Research Triangle Park, North Carolina; Division of Newborn Medicine, University of Tennessee, Memphis; Division of Neonatology, Northwestern University, Chicago; Division of Neonatology, University of Alberta, Winnepeg, Alberta, Canada; and Division of Newborn Medicine, University of Wisconsin, Madison