1. Imelda GI Clinical Research Centre, Department of Gastroenterology, Bonheiden, Belgium
2. University Hospitals Leuven, Department of Gastroenterology and Hepatology, Leuven, Belgium
3. CHU de Liège, Department of Gastroenterology, Liège, Belgium
4. INSERM UMR 1153, Paris Diderot University, Saint Louis Hospital, Paris, France
5. Beaujon Hospital, Department of Gastroenterology, APHP, Paris Diderot University, Clichy, France