1. Croatian Medical Association, Šubićeva 9, 10 000 Zagreb, Croatia
2. Unit of Clinical Nutrition, Division of Gastroenterology and Hepatology, Department of Internal Medicine, University Hospital Centre Zagreb, Kišpatićeva 12, 10 000 Zagreb, Croatia
3. Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
4. School of Medicine, University of Zagreb, Šalata 2, 10000 Zagreb, Croatia