1. Department of Obstetrics and Gynecology, Faculty of Medicine, Duzce University, Duzce, Turkey;
2. Obstetrics and Gynecology, Istanbul Medeniyet University Goztepe Education and Research Hospital, İstanbul, Turkey;
3. Obstetrics and Gynecology, Health Sciences University, Sisli Hamidiye Etfal Research and Training Hospital, İstanbul, Turkey