1. Department of Obstetrics and Gynecology, Balikesir State Hospital, Balikesir, Turkey
2. Department of Obstetrics and Gynecology, Division of Perinatology, University of Health Sciences, Tepecik Training and Research Hospital, Izmir, Turkey
3. Department of Obstetrics and Gynecology, Gaziosmanpasa University, Tokat, Turkey
4. Department of Obstetrics and Gynecology, Marmara University, Pendik Training and Research Hospital, Istanbul, Turkey
5. Department of Obstetrics and Gynecology, Samsun Training and Research Hospital, Samsun, Turkey
6. Department of Obstetrics and Gynecology, University of Health Sciences, Tepecik Training and Research Hospital, Izmir, Turkey
7. Department of Obstetrics and Gynecology, Tinaztepe University, Izmir, Turkey