[1] Erasmus MC, Dept Gastroenterol & Hepatol, NL-3015 CE Rotterdam, Netherlands
[2] Luigi Sacco Univ Hosp, Dept Gastroenterol, Inflammatory Bowel Dis Unit, Milan, Italy
[3] Vestfold Hosp Trust, Dept Med, Tonsberg, Norway
[4] IRCCS Ist Clin Humanitas, IBD Ctr, Dept Gastroenterol, Rozzano, Italy
[5] Rabin Med Ctr, Dept Gastroenterol, IBD Unit, Petah Tiqwa, Israel
[6] Tel Aviv Univ, Petah Tiqwa, Israel
[7] Univ & Med Sch Ioannina, Dept Gastroenterol & Hepatol, Ioannina, Greece
[8] Univ Zagreb, Sch Med, Childrens Hosp Zagreb, Zagreb 41000, Croatia
[9] Univ Hosp Bern, Clin Visceral Surg & Med, Dept Gastroenterol, CH-3010 Bern, Switzerland
[10] Erasmus MC, Dept Obstet & Gynecol, NL-3015 CE Rotterdam, Netherlands
[11] Herlev Univ Hosp, Gastroenterol Unit, DK-2730 Herlev, Denmark
[12] St James Univ Hosp, Dept Gastroenterol, Leeds LS9 7TF, W Yorkshire, England
[13] Hull & East Yorkshire Hosp, Kingston Upon Hull, N Humberside, England
[14] Hull & York Med Sch, Kingston Upon Hull, N Humberside, England
[15] Hosp Waldfriede, Dept Internal Med & Gastroenterol, Berlin, Germany
[16] Univ Hosp, Dept Internal Med 5, Gastroenterol Unit, Bratislava, Slovakia
[17] Univ Porto, Dept Pharmacol & Therapeut, P-4100 Oporto, Portugal
[18] Univ Porto, Ctr Drug Discovery & Innovat Med, MedInUP, P-4100 Oporto, Portugal
[19] Hosp Sao Joao, Dept Gastroenterol, Oporto, Portugal