[1] Univ Paris 07, Hop St Louis, APHP, Dept Gastroenterol, F-75010 Paris, France
[2] Technion Israel Inst Technol, Haifa & Rappoport Sch Med, Dept Gastroenterol, IL-32000 Haifa, Israel
[3] Charite, Campus Virchow Clin, Dep Gastroenterol & Hepatol, D-13353 Berlin, Germany
[4] CIBER EHD, Hosp Clin IDIBAPS, Dept Gastroenterol, Barcelona, Spain
[5] Univ Crete, Fac Med, Univ Hosp Heraklion, Dept Gastroenterol, Iraklion, Crete, Greece
[6] Univ Athens, Sch Med, Dept Biol, GR-10679 Athens, Greece
[7] Chelsea & Westminster Hosp Fdn Trust, Dept Gastroenterol, London, England
[8] Med Univ Graz, Graz, Austria
[9] Evangelismos Med Ctr, Dept Gastroenterol A, Athens, Greece
[10] Hop Neuchatelois, Gastroenterol Unit, Neuchatel, Switzerland
[11] Nancy Univ Hosp, Dept Gastroenterol, Vandoeuvre Les Nancy, France
[12] Nancy Univ Hosp, INSERM, U954, Vandoeuvre Les Nancy, France
[13] Univ Paris 07, Hop St Louis, APHP, Equipe Avenir,INSERM,U940, F-75010 Paris, France