1. Department of Obstetrics and Gynecology, Kanuni Sultan Suleyman Research and Training Hospital, Istanbul, Turkey
2. Department of Perinatology, Sadi Konuk Research and Training Hospital, Istanbul, Turkey
3. Department of Perinatology, Samsun Research and Training Hospital, Samsun, Turkey
4. Faculty of Medicine, Department of Perinatology, Medipol University, Istanbul, Turkey