1. Division of Perinatology, Department of Obstetrics and Gynecology, Hacettepe University Faculty of Medicine, Ankara, Turkey
2. Department of Biostatistics, Hacettepe University Faculty of Medicine, Ankara, Turkey
3. Department of Medical Biology, Hacettepe University Faculty of Medicine, Ankara, Turkey
4. Division of Neurology, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey