[1] ABT Gastroenterol, Univ Klin Innere Med 3, A-1090 Vienna, Austria
[2] Univ Hosp Gasthuisberg, Dept Gastroenterol, B-3000 Louvain, Belgium
[3] Karolinska Hosp, Dept Gastroenterol & Hepatol, S-10401 Stockholm, Sweden
[4] St Vincents Hlth, Melbourne, Vic, Australia
[5] Univ Amsterdam, Acad Med Ctr, Dept Gastroenterol, NL-1105 AZ Amsterdam, Netherlands
[6] Univ Calgary, Div Gastroenterol, Calgary, AB, Canada
[7] CHU Vaudois, Div Gastroenterol & Hepatol, Lausanne, Switzerland
[8] Univ Munich, Klinikum Grosshadern, D-8000 Munich, Germany
[9] Univ Calgary, Inflammatory Bowel Dis Clin, Calgary, AB, Canada
[10] Univ Kiel, Kiel, Germany
[11] Univ Toronto, Mt Sinai Hosp, IBD Grp, Toronto, ON M5S 1A1, Canada
[12] Univ Udine, Dept Expt & Clin Med, I-33100 Udine, Italy
[13] Univ Queensland, Nambour, Australia
[14] Erasmus MC, Rotterdam, Netherlands
[15] Univ Hosp Gathuisberg, Dept Gastroenterol, Louvain, Belgium
[16] CIBERehd, Hosp Clin Barcelona, Inst Invest Biomed August Pi & Sunyer, Barcelona, Spain