1. 1University ENT Clinic, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 1, 21000, Novi Sad, Serbia
2. 2Pathology and Histology Center, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 1-9, 21000, Novi Sad, Serbia
3. 3Radiology Center, Clinical Center of Vojvodina, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 1-9, 21000, Novi Sad, Serbia