1. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine; Department of Pediatrics, Division of Neonatology, Allegheny University of the Health Sciences, Philadelphia, Pennsylvania; Allegheny University Hospitals-City Line. Department of Obstetrics and Gynecology, 4150 City Avenue, Philadelphia, PA 19131-1696
2. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine; Department of Pediatrics, Division of Neonatology, Allegheny University of the Health Sciences, Philadelphia, Pennsylvania