1. Centre for Liver and Digestive Disorders, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
2. Gastroenterology Department, Hospital Senhora da Oliveira, Guimarães, Portugal
3. Faculty of Economics and Management, Open University of Cyprus, Nicosia, Cyprus
4. Department of Gastroenterology, Sheba Medical Center, Tel Hashomer, and Sackler School of Medicine, Tel Aviv University, Israel
5. Gastroenterology Unit, Valduce Hospital, Como, Italy
6. Department of Gastroenterology, Skåne University Hospital, Lund University, Malmö, Sweden