1. Clinic for Ophtalmology, School of Medicine, University of Niš, Serbia, Buld dr Zorana Đinđića 81, Niš, Serbia
2. Clinic for Plastic and Reconstractive Surgery, School of Medicine, University of Niš, Serbia, Buld dr Zorana Đinđića 81, Niš, Serbia
3. Center for Pathology, School of Medicine, University of Niš, Serbia, Buld dr Zorana Đinđića 81, Niš, Serbia