1. Department of Obstetrics and Gynaecology, Kayseri Military Hospital, Kayseri, Turkey,
2. Department of Obstetrics and Gynaecology, Kayseri Memorial Hospital, Kayseri, Turkey,
3. Department of Obstetrics and Gynaecology, Kayseri Education and Research Hospital of Medicine, Kayseri, Turkey,
4. Department of Family Planning, Kayseri Education and Research Hospital of Medicine, Kayseri, Turkey,
5. Department of Obstetrics and Gynaecology, Kayseri Acıbadem Hospital, Kayseri, Turkey, and
6. Department of Obstetrics and Gynaecology, Private Erciyes Hospital, Kayseri, Turkey