[1] Imelda GI Clin Res Ctr, Dept Gastroenterol, Bonheiden, Belgium
[2] Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[3] CHU Liege, Dept Gastroenterol, Liege, Belgium
[4] Paris Diderot Univ, St Louis Hosp, INSERM, UMR 1153, Paris, France
[5] Paris Diderot Univ, Beaujon Hosp, APHP, Dept Gastroenterol, Clichy, France