1. Department of Obstetrics and Gynecology, Polatlı State Hospital, Ankara, Turkey;
2. Department of Obstetrics and Gynecology, Isparta Maternity and Children’s Hospital, Isparta, Turkey;
3. Department of Obstetrics and Gynecology, Etlik Zubeyde Hanim Maternity and Women’s Health Teaching and Research Hospital, Ankara, Turkey;
4. Faculty of Medicine, Department of Obstetrics and Gynecology, Division of Perinatology, Suleyman Demirel University, Isparta, Turkey;
5. College of Arts and Sciences, University of Miami, Coral Gables, FL, USA;
6. Department of Obstetrics and Gynecology, Sincan State Hospital, Ankara, Turkey