1. Kocaeli Derince Training and Research Hospital, Department of Obstetrics and Gynecology, Perinatology Division Karadenizliler Mahallesi İzmit Kadın Doğum ve Çocuk Hastanesi İzmit/Kocaeli Turkey
2. Perinatology Division, Department of Obstetrics and Gynecology Van Yuzuncu Yil University Van Turkey
3. Department of Biophysics Hacettepe University School of Medicine Ankara Turkey