1. University of Novi Sad, Faculty of Medicine Novi Sad + Special Hospital for Rheumatic Diseases Novi Sad
2. University of Novi Sad, Faculty of Medicine Novi Sad + Institute of Child and Youth Health Care of Vojvodina, Novi Sad
3. University of Novi Sad, Faculty of Medicine Novi Sad
4. University of Novi Sad, Faculty of Medicine Novi Sad + Health Center “Novi Sad”, Novi Sad