1. Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, Conn
2. Department School of Women's and Infants' Health, University of Western Australia and Women and Infants Research Foundation, King Edward Memorial Hospital, Subiaco, Western Australia
3. Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine, New Haven, Conn,