Institution: | 1. Obstetrics and Gynecology Department, Yas Hospital, Tehran University of Medical Sciences, Tehran Iran ; 2. Obstetrics and Gynecology Department, Baqiyatallah Hospital, Baqiyatallah University of Medical Sciences, Tehran Iran ; 3. Department of Pathology, Faculty of Medicine, Yas Hospital, Tehran University of Medical Sciences, Tehran Iran ; 4. Obstetrics and Gynecology Department, Baharloo Hospital, Tehran University of Medical Sciences, Tehran Iran |