1. General Medicine Private Practice Enterprise, Osijek, Croatia
2. Department of Cybernetics and Artificial Intelligence, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Košice, Slovakia
3. Department of Psychological Medicine, Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
4. Department of Internal Medicine, Family Medicine and The History of Medicine, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia