[1] CHU Liege, B-4000 Liege, Belgium
[2] Univ Liege, B-4000 Liege, Belgium
[3] Axent Solut, Tacoronte 38107, Santa Cruz De T, Spain
[4] Sheba Med Ctr, Ramat Gan, Israel
[5] Tel Aviv Univ, Sackler Sch Med, Tel Aviv, Israel
[6] Complejo Univ Santiago de Compostela, Santiago De Compostela, Spain
[7] Univ Coll London Hosp, London, England
[8] Univ British Columbia, 770-1190 Hornby St, Vancouver, BC V3K 3V9, Canada
[9] Univ Hosp Munster, Dept Med Gastroenterol & Hepatol B, Albert Schweitzer Campus 1, D-48149 Munster, Germany
[10] London North West Healthcare, London, England
[11] Univ Calgary, 3280 Hosp Dr NW, Calgary, AB T2N4N1C, Canada
[12] Assoc Crohn RCUH, 2 Rue Argentines, B-6110 Montignies le Tilleul, Belgium
[13] Canada Crohns & Colitis, 220 Stiver St, Russell, ON K4R 1G9, Canada
[14] Confederac Asociac Enfermos Crohn & Colitis Ulcer, Madrid, Spain
[15] Schneebergstr 33, D-01277 Dresden, Germany
[16] Crohns & Colitis Fdn Israel, Hod Hasharon Towers,4 Hacharash St, IL-4524075 Neve Neeman, Hod Hasharon, Israel
[17] AbbVie Inc, Ave Burgos 91, Madrid 28050, Spain
[18] Hosp Univ Vall dHebron Pso, Crohn Colitis Care Unit UACC, Vall dHebron 119, Barcelona 08035, Spain