1. From the Center for Perinatal Research, the Abigail Wexner Research Institute, and the Division of Neonatology (C.H.B., J.L.S.) and the Heart Center (C.H.B.), Nationwide Children’s Hospital, and the Department of Pediatrics, College of Medicine (C.H.B., J.L.S.), and the Division of Epidemiology, College of Public Health (J.L.S.), Ohio State University — all in Columbus.