1. Faculty of Medicine, Department of Obstetrics and Gynecology, Üsküdar University, İstanbul, Turkey
2. Department of Obstetrics and Gynecology, Memorial Bahcelievler Hospital, Istanbul, Turkey
3. Department of Obstetrics and Gynecology, Memorial Sisli Hospital, Istanbul, Turkey
4. Department of Perinatology, Acıbadem International Hospital, Istanbul, Turkey