[1] Hosp Beatriz Angelo, Dept Gastroenterol, Loures, Portugal
[2] Copenhagen Univ Hosp Amager & Hvidovre, Gastrounit Med Div, Copenhagen, Denmark
[3] St Marks Natl Hosp, Dept IBD, London, England
[4] CHU Clermont Ferrand, IBD Unit, Clermont Ferrand, France
[5] Mater Hosp, Div Gastroenterol, Msida, Malta
[6] Univ Hosp CHU Liege, Hepato Gastroenterol & Digest Oncol, Liege, Belgium
[7] Hosp Clin Barcelona, Dept Gastroenterol, CIBER EHD, IDIBAPS,IBD Unit, Barcelona, Spain
[8] ISCARE as, IBD Clin & Res Ctr, Prague, Czech Republic
[9] Hosp Univ Galdakao, Dept Gastroenterol, Galdakao, Spain
[10] Hull Univ Teaching Hosp, IBD Res Unit Dept Gastroenterol, Kingston Upon Hull, England
[11] Hosp Garcia Orta, Dept Gastroenterol, Almada, Portugal
[12] Amer Gastroenterol Ctr, Dept Gastroenterol, Nicosia, Cyprus
[13] Algomed Policlin, Dept Gastroenterol, Timisoara, Romania
[14] Hosp Alvaro Cunqueiro, Dept Gastroenterol, Vigo, Spain
[15] Inst Invest Sanitaria Galicia Sur, Vigo, Spain
[16] Univ Lille, INFINITE Inst Translat Res Inflammat, Inserm, U1286,CHU Lille, F-59000 Lille, France
[17] CHU Amiens Picardie, Dept Gastroenterol, Amiens, France
[18] IRCCS Osped San Raffaele, Gastroenterol & Endoscopy IBD Ctr, Milan, Italy
[19] Slagelse Hosp, Dept Gastroenterol, Slagelse, Denmark
[20] Univ Padua, Div Gastroenterol, Dept Surg Oncol & Gastroenterol, Padua, Italy
[21] Hosp Luz Learning Hlth, Invest Ctr, Lisbon, Portugal
[22] Mt Sinai Hosp, Dept Gastroenterol, New York, NY USA
[23] Ctr Res Epidemiol & Stat, ECSTRRA Unit, UMR 1153 Inserm, Paris, France
[24] Hosp Luz, Div Gastroenterol, Lisbon, Portugal