1. Maternal Fetal Medicine, Etlik Zubeyde Hanim Kadin Hastaliklari Egitim ve Arastirma Hastanesi, Ankara, Turkey
2. Obstetrics and Gynecology, Koc University Hospital, Topkapi, Turkey
3. Biochemistry, Faculty of Medicine, Yildirim Beyazit University, Ankara, Turkey
4. Biochemistry, Yildirim Beyazit Universitesi Tip Fakultesi, Ankara, Turkey