1 Department of Gastroenterology, Hepatology and Clinical Nutrition, University Hospital Dubrava, University of Zagreb School of Medicine and Faculty of Pharmacy and Biochemistry, Zagreb, Croatia.
2 Department of Gastroenterology and Hepatology, University Hospital Centre Tuzla, Tuzla, Bosnia and Herzegovina.
3 Department of Pathology and Cytology, University Hospital Dubrava, University of Zagreb School of Medicine, Zagreb, Croatia.