Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Howard University College of Medicine Washington DC 20060 USA;
Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Aspirus Health Care Wausau WI 54401 USA;
Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Howard University College of Medicine Washington DC 20060 USA;