1. Department of Obstetrics and Gynecology, Southern California Kaiser Permanente, Kern County, 1200 Discovery Drive, Bakersfield, California 93309, USA
2. Department of Obstetrics and Gynecology, The Brooklyn Hospital Center, 121 DeKalb Avenue, Brooklyn 11201, USA
3. St. George’s University, School of Medicine, St. George’s, West Indies, Grenada
4. Department of Obstetrics and Gynecology, Lincoln Medical and Mental Health Center, 234 East 149th Street, Bronx, New York 10451, USA
5. Department of Obstetrics and Gynecology, Comprehensive Medical Care of the Bronx, 1931 Williamsbridge Road, Bronx, New York 10461, USA
6. Takeshige Medical, PO Box 121, Edgewater, New Jersey 07020, USA
7. Maternal and Fetal Medicine, Department of Obstetrics and Gynecology, Lincoln Medical and Mental Health Center, 234 East 149th Street, Bronx, New York 10451, USA