| Institution: | (1) Department of Gynecology and Obstetrics, Johns Hopkins Bayview Medical Center, 4940 Eastern Avenue, Rm A-121, Baltimore, MD 21224-2780, USA;(2) Department of Obstetrics and Gynecology, Oklahoma University Health Sciences Center, Oklahoma City, OK, USA;(3) Department of Gynecology, Greater Baltimore Medical Center, Baltimore, MD, USA;(4) Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA;(5) Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada |
