1. Department of Occupational Medicine, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
2. Institute of Occupational Health of Novi Sad, Novi Sad, Serbia
3. University Clinical Center of Vojvodina, Novi Sad, Serbia
4. Department of Occupational Medicine, Faculty of Medicine, University of Banja Luka, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
5. Institute of Occupational Health and Sports Medicine, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
6. Department of Medical rehabilitation, Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
7. Special Hospital for Rheumatic Diseases, Novi Sad, Serbia