1. Department of Obstetrics and Gynecology, Ministry of Health Ankara City Hospital, Ankara, Turkey
2. Department of Obstetrics and Gynecology, İstanbul Zeynep Kamil Women and Child Diseases Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
3. Department of Obstetrics and Gynecology, Ankara Gülhane Education and Research Hospital, University of Health Sciences, Ankara, Turkey
4. Department of Biostatistics and Medical Informatics, Ankara Yıldırım Beyazıt University, Ankara, Turkey
5. Department of Obstetrics and Gynecology, Etlik Zübeyde Hanım Women's Health Education and Research Hospital, University of Health Sciences, Ankara, Turkey