1. Department of Obstetrics and Gynaecology, Tokat State Hospital, Tokat, Turkey
2. Obstetrics and Gynaecology, Darende/Malatya, Darende State Hospital, Turkey
3. Department of Obstetrics and Gynaecology, Istanbul Cerrahpasa University, Fatih, Turkey
4. Department of Obstetrics and Gynaecology, Carl Von Ossietzky Oldenburg University, Klinikum Oldenburg, AöR, Oldenburg, Germany