1. Department of Internal Medicine, History of Medicine and Medical Ethics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
2. Department of Gastroenterology, University Medical Centre Ljubljana, Ljubljana, Slovenia
3. Institute of Microbiology and Immunology, Medical Faculty of Ljubljana, Ljubljana, Slovenia
4. Department of Research & Development, In-Medico, Metlika, Slovenia
5. Department of Public Health, Faculty of Health Sciences, Ljubljana, Slovenia