[1] Univ Hosp Schleswig Holstein, Dept Internal Med 1, Arnold Heller Str 3, D-24105 Kiel, Germany
[2] IRCCS Osped San Raffaele, Gastroenterol & Endoscopy, Milan, Italy
[3] Univ Vita Salute San Raffaele, Milan, Italy
[4] Goethe Univ, Agaples Markus Hosp, Dept Med 1, Frankfurt, Germany
[5] Hosp Badalona Germans Trias & Pujol, Dept Gastroenterol, Badalona, Spain
[6] CIBEREHD, Badalona, Spain
[7] Univ Autonoma Barcelona, Dept Med, Barcelona, Spain
[8] Univ Cagliari, Dept Med Sci & Publ Hlth, Cagliari, Italy
[9] Katholieke Univ Leuven, Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[10] Orebro Univ, Fac Med & Hlth, Dept Gastroenterol, Orebro, Sweden
[11] St Marks Hosp, IBD Unit, London, England
[12] Univ Porto, Fac Med, CINTESIS RISE, Porto, Portugal
[13] Western Gen Hosp, Edinburgh Inflammatory Bowel Dis Unit, Edinburgh, Midlothian, Scotland
[14] European Federat Crohns & Ulcerat Colitis Assoc E, Brussels, Belgium
[15] Maastricht Univ, Med Ctr, Div Gastroenterol & Hepatol, Maastricht, Netherlands
[16] Univ Oxford, Nuffield Dept Populat Hlth, Oxford, England
[17] Oxford PharmaGenesis, Oxford, England
[18] Nancy Univ Hosp, Dept Gastroenterol, Vandoeuvre Les Nancy, France
[19] Univ Lorraine, NGERE, INSERM, Nancy, France
[20] Nancy Univ Hosp, INFINY Inst, Vandoeuvre Les Nancy, France
[21] Nancy Univ Hosp, FHU CURE, Vandoeuvre Les Nancy, France
[22] Grp Hosp Prive Ambroise Pare Hartmann, Paris IBD Ctr, Neuilly Sur Seine, France
[23] McGill Univ, Div Gastroenterol & Hepatol, Ctr Hlth, Montreal, PQ, Canada