1. Clinical Centre of Vojvodina, Medical Rehabilitation Clinic, Novi Sad, Serbia + University of Novi Sad, Faculty of Medicine, Novi Sad, Serbia
2. University of Banja Luka, Faculty of Medicine, Dr Miroslav Zotović Institute for Physical Medicine and Rehabilitation, Department of Rheumatology, Banja Luka, Republic of Srpska, Bosnia and Herzegovina
3. University of Priština – Kosovska Mitrovica, Faculty of Medicine, Kosovska Mitrovica, Serbia
4. Clinical Centre of Vojvodina, Medical Rehabilitation Clinic, Novi Sad, Serbia
5. University of Novi Sad, Faculty of Medicine, Novi Sad, Serbia + Special Hospital for Rheumatic Diseases, Novi Sad, Serbia