1. Division of Gastroenterology, Department of Internal Medicine, “Sestre Milosrdnice” University Hospital Centre, School of Medicine and Dental Medicine, University of Zagreb, Zagreb, Croatia;
2. Department of Internal Medicine, County Hospital Čakovec, Čakovec, Croatia;
3. Magdalena – Clinic for Cardiovascular Diseases of the Faculty of Osijek, Krapinske Toplice, Croatia