1 Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901; Division of Maternal-Fetal Medicine, Prenatal Testing Center, Hartford Hospital, University of Connecticut School of Medicine, Hartford, CT. Electronic address: [email protected].
2 Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901.