1Zagreb Health Center-Center, Zagreb, Croatia; 2Department of Gastroenterology, Hepatology and Clinical Nutrition, Dubrava University Hospital, Zagreb, Croatia; 3School of Medicine, University of Zagreb, Zagreb, Croatia; 4Division of Interventional Gastroenterology, Dubrava University Hospital, Zagreb, Croatia; 5School of Medicine, University of Rijeka, Rijeka, Croatia; 6Division of Inflammatory Bowel Disease and Clinical Nutrition, Dubrava University Hospital, Zagreb, Croatia.