1. Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
2. Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
3. Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
4. General Hospital Vukovar, Županijska 35, 32000 Vukovar, Croatia
5. Department of Surgery, Osijek University Hospital Center, 31000 Osijek, Croatia
6. Department of Radiotherapy and Oncology, University Hospital Center Osijek, 31000 Osijek, Croatia
7. Health Center Vukovar, 32000 Vukovar, Croatia
8. Health Center Osijek, 31000 Osijek, Croatia
9. Family Medicine Practice, 31000 Osijek, Croatia