1. Department of Obstetrics and Gynecology, Memorial Ankara Hospital, Ankara, Turkey;
2. Department of Obstetrics and Gynecology, Etlik Zubeyde Hanim Women's Health Teaching and Research Hospital, Ankara, Turkey;
3. Department of Obstetrics and Gynecology, Faculty of medicine, Istanbul Medipol University Hospital, Istanbul, Turkey;
4. Department of Obstetrics and Gynecology, Minel Clinic, Ankara, Turkey;
5. Department of Medical Biochemistry, School of Medicine, Firat University, Elazig, Turkey