[1] Hull Univ Teaching Hosp, IBD Unit, Kingston Upon Hull HU3 2JZ, N Humberside, England
[2] Univ Hull, Hull York Med Sch, Kingston Upon Hull, N Humberside, England
[3] Northern Hosp Epping, Melbourne, Vic, Australia
[4] Univ Melbourne, Melbourne, Vic, Australia
[5] Karolinska Inst, Dept Med, Stockholm, Sweden
[6] Karolinska Univ Hosp, Dept Gastroenterol Dermatovenereol & Rheumatol, Gastroenterol Unit, Stockholm, Sweden
[7] Univ Campania Luigi Vanvitelli, Dept Adv Med & Surg Sci, Naples, Italy
[8] Pontificia Univ Catolica Parana PUCPR, Colorectal Surg Unit, Curitiba, Parana, Brazil
[9] Cantonal Hosp Winterthur, Dept Surg, Winterthur, Switzerland
[10] Univ Basel, Fac Med, Basel, Switzerland
[11] Univ Med Ctr Groningen, Dept Gastroenterol & Hepatol, Groningen, Netherlands
[12] Cambridge Univ Hosp NHS Fdn Trust, Addenbrookes Hosp, Cambridge Colorectal Unit, Cambridge, England
[13] Erasmus MC Univ Med Ctr Rotterdam, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[14] Hosp Gen Univ Alicante, Gastroenterol Dept, ISABIAL, Alicante, Spain
[15] CIBERehd, Alicante, Spain
[16] OpenSourceRes Org Osrc Network, Aalborg, Denmark
[17] Univ Hosp Bern, Inselspital, Clin Visceral Surg & Med, Bern, Switzerland
[18] Guys & St Thomas Hosp NHS Trust, Dept Gastroenterol, London, England
[19] Hosp Univ & Politecn La Fe, Colorectal Unit, Gen Surg, Valencia, Spain
[20] Humanitas Univ, Dept Biomed Sci, Milan, Italy
[21] IRCCS, Humanitas Res Hosp, Milan, Italy