1. Department of Gastroenterology and Hepatology, University Hospitals Leuven, KU Leuven, Herestraat, Leuven, Belgium
2. Division of Gastroenterology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
3. Gastro-entérologie La Source-Beaulieu, Lausanne, Switzerland
4. Division of Gastroenterology, Department of Medicine, Western University, London, Ontario, Canada
5. Department of Pathology, University Hospitals Leuven, KU Leuven, Herestraat, Leuven, Belgium
6. Department of Gastroenterology, AZA Herentals, Herentals, Belgium