1. Department for Ophthalmology, Medical Faculty, University of Novi Sad, Hajduk Veljkova 1–9, 21000 Novi Sad, Serbia
2. University Eye Clinic, University Clinical Center of Vojvodina, Hajduk Veljkova 1–9, 21000 Novi Sad, Serbia
3. University Clinic for Anesthesiology, University Clinical Center of Vojvodina, Hajduk Veljkova 1–9, 21000 Novi Sad, Serbia