1. Department of Obstetrics and Gynecology, Cerrahpasa Medical School, İstanbul University, İstanbul, Turkey;
2. Department of Pathology, Cerrahpasa Medical School, İstanbul University, İstanbul, Turkey;
3. Department of Obstetrics and Gynecology, İstanbul Aydin University, İstanbul, Turkey;
4. Umraniye Education and Research Hospital, İstanbul, Turkey