1. Obstetrics and Gynecology Istanbul, Kanuni Sultan Suleyman Education and Research Hospital, Turkey
2. Carl von Ossietzky Oldenburg University, University Hospital for Gynecology and Obstetrics, Klinikum Oldenburg AöR, Oldenburg, Germany
3. Education and Research Hospital, Obstetrics and Gynecology, Sakarya University, Sakarya, Turkey
4. Department of Obstetrics and Gynecology, Istanbul Cerrahpasa University, Istanbul, Turkey
5. Faculty of Medicine, Medical Biochemistry Department, Istinye University, Istanbul, Turkey
6. Department of Obstetrics and Gynaecology, Tokat State Hospital, Tokat, Turkey