1. Medical School, Department of Ophthalmology, Gazi University, Ankara, Turkey
2. Cubuk State Hospital, Ankara, Turkey
3. Medical School, Department of Medical Pathology, Gazi University, Ankara, Turkey
4. Gumushane State Hospital, Gumushane, Turkey
5. Department of Ophthalmology, Bolu Abant Izzet Baysal University, Training and Research Hospital, Bolu, Turkey