[1] Barts Hlth NHS Trust, Dept Gastroenterol, London, England
[2] Queen Mary Univ London, Blizard Inst, Ctr Immunobiol, Barts & London Med Sch, London, England
[3] Univ Tor Vergata Rome, Dept Syst Med, Rome, Italy
[4] San Camillo Forlanini Hosp, Dept Gastroenterol & Digest Endoscopy, IBD Unit, Rome, Italy
[5] Univ Vita Salute San Raffaele, Dept Gastroenterol, Milan, Italy
[6] Univ Ioannina, Dept Internal Med, Div Gastroenterol, Sch Hlth Sci, Ioannina, Greece
[7] Tel Aviv Univ, Sheba Med Ctr, Sackler Sch Med, Tel Aviv, Israel
[8] Cambridge Univ Hosp NHS Fdn Trust, Dept Gastroenterol, Cambridge, England
[9] NYU Grossman Sch Med, Dept Med, Div Gastroenterol, New York, NY USA
[10] Teaching Hosp Jaffna, Univ Med Unit, Jaffna, Sri Lanka
[11] Copenhagen Univ Hosp Amager & Hvidovre, Gastrounit, Hvidovre, Denmark
[12] Copenhagen Univ Hosp Amager & Hvidovre, Copenhagen Ctr Inflammatory Bowel Dis Children Ad, Hvidovre, Denmark
[13] Erasmus MC, Paediat Gastroenterol, Rotterdam, Netherlands
[14] Radboud Univ Nijmegen, Inflammatory Bowel Dis Ctr, Dept Gastroenterol & Hepatol, Med Ctr, Nijmegen, Netherlands
[15] Univ Med Ctr Rotterdam, Dept Gastroenterol & Hepatol, Erasmus MC, Rotterdam, Netherlands
[16] Mater Dei Hosp, Dept Med, Div Gastroenterol, Msida, Malta
[17] GZO Zurich Reg Hlth Ctr, Div Gastroenterol & Hepatol, Wetzikon, Switzerland
[18] Univ Hosp Lausanne CHUV, Div Gastroenterol & Hepatol, Lausanne, Switzerland
[19] Univ Birmingham, Inst Immunol & Immunotherapy, Birmingham, England
[20] Univ Hosp Birmingham, NIHR Wellcome Trust Clin Res Facil, Birmingham, England
[21] Wellington Hosp, Dept Gastroenterol, Wellington, New Zealand
[22] Attikon Univ Hosp, Gastroenterol Dept, Athens, Greece
[23] Venizeleio Gen Hosp, Dept Gastroenterol, Iraklion, Greece
[24] Sorbonne Univ, Hop St Antoine, Inst Pierre Louis Epidemiol & St Publ, Dept Gastroenterol, Paris, France
[25] Univ Bordeaux, CHU Bordeaux, Hop Haut Leveque, Serv Hepatogastroenterol & Oncol Digest, Bordeaux, France
[26] Univ Ghent, Dept Internal Med & Pediat, Ghent, Belgium
[27] Ghent Univ Hosp, Dept Gastroenterol, Ghent, Belgium
[28] Univ Szeged, Fac Med, Dept Internal Med, Gastroenterol, Szeged, Hungary
[29] Barts Hlth NHS Trust, Royal London Hosp, Dept Gastroenterol, London, England
[30] ASST Rhodense, Rho Hosp, Gastroenterol Unit, Rho, MI, Italy
[31] Univ Hosp Zurich, Dept Gastroenterol & Hepatol, Zurich, Switzerland