1. Department of Ophthalmology, Merzifon State Hospital, Amasya, Turkey
2. Department of Ophthalmology, Gulhane School of Medicine, University of Health Sciences, Ankara, Turkey
3. Department of Ophthalmology, Hitit University, School of Medicine, Çorum, Turkey
4. School of Medicine, Department of Ophthalmology, Süleyman Demirel University, Isparta, Turkey