[1] IRCCS San Raffaele Hosp, Gastroenterol & Endoscopy, Via Olgettina 60, Milan, Italy
[2] Univ Porto, Fac Med, CINTESIS RISE, Porto, Portugal
[3] Goethe Univ, Agaples Markus Hosp, Dept Med 1, Frankfurt, Germany
[4] Dubai Hlth, Rashid Hosp, Digest Dis Unit, Dubai, U Arab Emirates
[5] Ctr Invest Biomed Red Enfermedades Hepat & Digest, Dept Gastroenterol, Madrid, Spain
[6] Hosp Gen Univ Alicante, Inst Invest Sanitaria & Biomed Alicante ISABIAL, Dept Gastroenterol, Alicante, Spain
[7] Santa Cruz Hosp, Gastroenterol Unit, Curitiba, Brazil
[8] Natl Med Inst Minist Interior & Adm, Dept Gastroenterol & Internal Med, Warsaw, Poland
[9] Univ Ulsan, Inflammatory Bowel Dis Ctr, AsanMed Ctr, Dept Gastroenterol,Coll Med, Seoul, South Korea
[10] Shanghai Univ Med & Hlth Sci, Zhou Pu Hosp, Dept Gastroenterol, Shanghai, Peoples R China
[11] St Marks Hosp, Inflammatory Bowel Dis Unit, London, England
[12] Western Univ, Dept Gastroenterol, Schulich Sch Med & Dent, London, ON, Canada
[13] Western Univ, Schulich Sch Med & Dent, Dept Med, London, ON, Canada
[14] San Camillo Forlanini Hosp, Dept Gastroenterol & Digest Endoscopy, IBD Unit, Rome, Italy
[15] Nancy Univ Hosp, Dept Gastroenterol, Vandoeuvre Les Nancy, France
[16] Univ Lorraine, Dept Gastroenterol, Inserm, NGERE, Nancy, France
[17] Nancy Univ Hosp, INFINY Inst, Dept Gastroenterol, Vandoeuvre Les Nancy, France
[18] Nancy Univ Hosp, FHU CURE, Dept Gastroenterol, Nancy, France
[19] Grp Hosp Prive Ambroise Pare Hartmann, Paris IBD Ctr, Dept Gastroenterol, Neuilly Sur Seine, France
[20] McGill Univ, Hlth Ctr, Div Gastroenterol & Hepatol, Dept Gastroenterol, Montreal, PQ, Canada
[21] Univ Vita Salute San Raffaele, Gastroenterol & Endoscopy, Milan, Italy