1. Department of Ophthalmology, Ankara University Faculty of Medicine, Ankara, Turkey
2. Private Eye Clinic, Ankara, Turkey
3. Department of Ophthalmology, Dünyagöz Hospital, Ankara, Turkey
4. Departmant of Pediatrics, Ankara University Faculty of Medicine, Ankara, Turkey
5. Department of Biostatistics, Ankara University Faculty of Medicine, Ankara, Turkey