1. Department of Neonatology, University of Health Sciences of Turkey, Dr. Sami Ulus Maternity and Children Training and Research Hospital, Ankara, Turkey
2. Department of Ophtalmology, University of Health Sciences of Turkey, Dr. Sami Ulus Maternity and Children Training and Research Hospital, Ankara, Turkey
3. Department of Neonatology, Memorial Dicle Hospital, Diyarbakır, Turkey
4. Department of Neonatology, Şanlıurfa Research and Training Hospital, Şanlıurfa, Turkey