Charite - Universitätsmedizin Berlin, Berlin, Germany
University of South Alabama, Mobile, Alabama, United States
Department of Obstetrics and Gynecology, Louisiana State University Health Sciences Center, PO Box 33932, 1501 Kings Highway, Shreveport, Louisiana, United States
Department of OB-GYN, Division of Maternal Fetal Medicine, University of Texas Medical Branch, 301 University Boulevard, Galveston, Texas, United States