1. Department of Neonatology, Faculty of Medicine, İzmir Katip Celebi University, Balatcik Mahallesi, Turkey
2. Department of Obstetrics and Gynecology, Tepecik Training and Research Hospital, Konak/İzmir, Turkey
3. Department of Biostatistics, Faculty of Medicine, İzmir Katip Celebi University, İzmir, Turkey