1. Faculty of Dental Medicine and Health of Osijek, Josip Juraj Strossmayer University of Osijek, Crkvena 21, 31 000 Osijek, Croatia
2. Community Healthcare Center of Osijek-Baranja County, 31 000 Osijek, Croatia
3. Department of Dental Medicine, Faculty of Dental Medicine and Health of Osijek, Josip Juraj Strossmayer University of Osijek, Crkvena 21, 31 000 Osijek, Croatia
4. Department of Periodontology, Faculty of Dental Medicine Rijeka, University of Rijeka, 51 000 Rijeka, Croatia
5. Clinical Hospital Center Rijeka, 51 000 Rijeka, Croatia