1. Department of Obstetrics and Gynecology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey;
2. Department of Obstetrics and Gynecology, University of North Carolina, Division of Reproductive Endocrinology and Infertility, Chapel Hill, NC, USA;
3. Department of Obstetrics and Gynecology, Kanuni Sultan Suleyman Research and Training Hospital, Istanbul, Turkey;
4. Department of Obstetrics and Gynecology, Istanbul University Cerrahpasa School of Medicine, Istanbul, Turkey;
5. Department of Obstetrics and Gynecology, Liv Hospital, Istanbul, Turkey;
6. Department of Biochemistry, Istanbul University Cerrahpasa School of Medicine, Istanbul, Turkey