1. Department of Family Medicine, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, 31000 Osijek, Croatia
2. Research Association Alliance Institute for the Promotion of Preventive Medicine (APPREMED), 2800 Mechelen, Belgium
3. General Practice, Huisartsenpraktijk, Bremtstraat 116, 9320 Aalst, Belgium
4. Department of Pathophysiology, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, 31000 Osijek, Croatia
5. The Clinic for Internal Disease, Unit for Endocrinology and Diabetes, Clinical Hospital Centre Osijek, J. Huttlera 4, 31000 Osijek, Croatia