1. Department of Neurology, Osijek University Hospital Centre, Osijek, Croatia.
2. Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia.
3. Department for Dermatology and Venereology, Osijek University Hospital Centre, Osijek, Croatia.
4. Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia.
5. Department of Gastroenterology, Dr. Josip Benčević General Hospital, Slavonski Brod, Croatia.