1. Department of Obstetrics and Gynecology, Health Sciences University, Zeynep Kamil Maternity and Children’s Training and Research Hospital, İstanbul, Turkey;
2. Department of Obstetrics and Gynecology, Health Sciences University, Kanuni Sultan Süleyman Education and Research Hospital, Istanbul, Turkey;
3. Department of Clinical Biochemistry, Faculty of Medicine, Yildirim Beyazit University, Ankara, Turkey