[1] Inst Arnault Tzanck, Dept Gastroenterol & Hepatol, F-06700 St Laurent Du Var, France
[2] CHU Brabois, Dept Internal Med 1, Vandoeuvre Les Nancy, France
[3] Aarhus Univ Hosp, Dept Surg Gastroenterol, Aarhus, Denmark
[4] Int Agcy Res Canc, F-69372 Lyon, France