1. Department of Gastroenterology and Digestive Oncology, CUB Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
2. Department of Gastroenterology, Hepatopancreatology and Digestive Oncology, CUB Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
3. Department of Gastroenterology and Hepatology, CHU Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
4. Department of Pathology, CUB Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium