1. Department of Obstetrics and Gynecology; West Virginia University Charleston Campus; Charleston WV USA
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology; Hofstra Northwell School of Medicine, Southside Hospital; Bay Shore NY USA
3. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Hofstra Northwell School of Medicine; North Shore University Hospital; Manhasset NY USA
4. Department of Pathology; Charleston Area Medical Center; Charleston WV USA
5. Center for Health Services & Outcomes Research; Charleston Area Medical Center; Charleston WV USA