1 Department of Gastroenterology, University Hospitals Leuven, KU Leuven, Leuven, Belgium.
2 Department of Gastroenterology, University Hospitals Leuven, KU Leuven, Leuven, Belgium. marc.ferrante@uzleuven.be.
3 Department of Clinical and Experimental Medicine, Translational Research Centre for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium. marc.ferrante@uzleuven.be.