1. Neonatal Intensive Care Unit, Sanliurfa Mehmet Akif Inan Training and Research Hospital, Sanliurfa, Turkey.
2. Neonatal Intensive Care Unit, Sanliurfa Training and Research Hospital, Sanliurfa, Turkey.
3. Pediatric Cardiology, Sanliurfa Mehmet Akif Inan Training and Research Hospital, Sanliurfa, Turkey.
4. Department of Biostatistics, Faculty of Medicine, Ataturk University, Erzurum, Turkey.