[1] Univ Med Berlin, Charite, Campus Virchow Clin, Div Gastroenterol & Hepatol, D-13353 Berlin, Germany
[2] Univ Henri Poincare 1, Univ Hosp Nancy, INSERM, U954, Vandoeuvre Les Nancy, France
[3] Univ Henri Poincare 1, Univ Hosp Nancy, Dept Hepatogastroenterol, Vandoeuvre Les Nancy, France
[4] Univ Hosp Gasthuisberg, Dept Gastroenterol, B-3000 Louvain, Belgium
[5] Univ Porto, Fac Med, Inst Pharmacol & Therapeut, Oporto, Portugal
[6] Hosp Sao Joao, Dept Gastroenterol, Oporto, Portugal
[7] Cent Manchester Univ Hosp NHS Trust, Dept Gastroenterol, Manchester, Lancs, England
[8] Univ Libre Bruxelles, Lab Gastroenterol Expt, B-1070 Brussels, Belgium
[9] Univ Med Ctr Utrecht, Dept Gastroenterol & Hepatol, Utrecht, Netherlands
[10] Univ Gothenburg, Sahlgrenska Acad, Inst Med, Dept Internal Med, Gothenburg, Sweden
[11] Univ Milan, L Sacco Univ Hosp, Dept Gastroenterol Surg Oncol, Milan, Italy
[12] UZ Brussels, Brussels, Belgium
[13] Univ Paris Diderot, Hop St Louis, APHP, Dept Gastroenterol, Paris, France
[14] Ist Clin Humanitas, Dept Gastroenterol, Milan, Italy