[1] Univ Bologna, DIMEC, IBD Unit, Via Massarenti 9, I-40138 Bologna, Italy
[2] Agaples Markus Hosp, Dept Med 1, Willhelm Epstein Str 4, D-60431 Frankfurt, Germany
[3] Ist Clin Humanitas IRCCS Gastroenterol, Via Manzoni 56, I-20089 Milan, Italy
[4] Univ Porto, Dept Pharmacol & Therapeut, Oporto, Portugal
[5] MedInUP, Ctr Drug Discovery & Innovat Med, Oporto, Portugal
[6] Ctr Hosp Sao Joao, Oporto, Portugal
[7] Univ Zurich Hosp, Div Gastroenterol & Hepatol, Ramistr 100, CH-8091 Zurich, Switzerland
[8] Semmelweis Univ, Dept Med 1, Koranyi Sandor 2-A, H-1083 Budapest, Hungary
[9] Kantonsspital Winterthur, Dept Visceral & Thorac Surg, Brauerstr 15, CH-8401 Winterthur, Switzerland
[10] Univ Milan, ASST Fatebenefratelli Sacco, Gastrointestinal Unit, Via GB Grassi 74, I-20157 Milan, Italy
[11] Univ Amsterdam, Dept Surg, Acad Med Ctr, Meibergdreef 9, NL-1105 AZ Amsterdam, Netherlands
[12] Hull & East Yorkshire NHS Trust, IBD Unit, Anlaby Rd, Kingston Upon Hull HU3 2JZ, N Humberside, England
[13] Univ Bologna, DIMEC, Surg Unit, Via Giuseppe Massarenti 9, I-40138 Bologna, Italy
[14] Osped Luigi Sacco Polo Univ, ASST Fatebenefratelli Sacco, Dept Surg, IBD Surg Unit, Via GB Grassi 74, I-20157 Milan, Italy
[15] Univ Hosp Rebro, Dept Gastroenterol & Hepatol, Kispaticeva Ulica 12, Zagreb, Croatia
[16] Erasmus Univ, Med Ctr, Dept Gastroenterol & Hepatol, Gravendijkwal 230, NL-3015 CE Rotterdam, Netherlands
[17] Univ Hosp Santiago De Compostela CHUS, Dept Gastroenterol, Travesia Choupana S-N, Santiago De Compostela 15706, A Coruna, Spain
[18] Hosp Luneburg, Outpatients Dept Gastroenterol, Bogelstr 1, D-21339 Luneburg, Germany
[19] Univ Hosp Coimbra, Dept Gastroenterol, Ave Bissaya Barreto, P-3000075 Coimbra, Portugal
[20] Stadtspital Triemli, Dept Gastroenterol & Internal Med, Birmensdorferstr 497, CH-8063 Zurich, Switzerland
[21] Univ Zaragoza, IIS Aragon, CIBEREHD, Med,Hosp Clin Univ Lozano Blesa, Zaragoza, Spain