1. Department of Internal Medicine, Family Medicine and the History of Medicine, Faculty of Medicine, University Josip Juraj Strossmayer, Osijek, Croatia
2. Department of Economics, University Josip Juraj Strossmayer, Osijek, Croatia
3. Department of Physiology and Immunology, Faculty of Dental Medicine and Health, University Josip Juraj Strossmayer, Osijek, Croatia