[1] CHU Dinant Godinne, Dept Gastroenterol, B-5530 Yvoir, Belgium
[2] Ctr Hosp Sao Joao, Dept Gastroenterol, Oporto, Portugal
[3] Univ Porto, Fac Med, Inst Pharmacol & Therapeut, P-4100 Oporto, Portugal
[4] Univ Porto, Inst Mol & Cell Biol, P-4100 Oporto, Portugal
[5] Hosp Sao Joao, Dept Infect Dis, Oporto, Portugal
[6] Univ Cattolica Sacro Cuore, IBD Unit, I-00168 Rome, Italy
[7] Sheba Med Ctr, Dept Gastroenterol, IL-52961 Ramat Gan, Israel
[8] Rambam Hlth Care Campus, Dept Gastroenterol, IL-31096 Haifa, Israel
[9] Univ Palermo, Dipartimento Biomed Med Interna & Specialist, I-90133 Palermo, Italy
[10] Sophia Childrens Univ Hosp, NL-3000 CB Rotterdam, Netherlands
[11] Univ Coll Dublin, St Vincents Univ Hosp, Ctr Colorectal Dis, Dublin, Ireland
[12] Univ Coll Dublin, Sch Med & Med Sci, Dublin, Ireland
[13] Gastroenterol Outpatient Clin, D-69121 Heidelberg, Germany
[14] Univ Barcelona, Hosp Univ Mutua de Terrassa, Catalonia, Spain
[15] Univ Hosp Ioannina, Med Sch Ioannina, Div Gastroenterol, Ioannina, Greece
[16] Western Gen Hosp, Gastrointestinal Unit, Edinburgh EH4 2XU, Midlothian, Scotland
[17] Fdn Trust, Guys & St Thomas NHS, Dept Infect Dis, London SE1 7EH, England
[18] Univ Antwerp Hosp, Dept Gastroenterol, B-2650 Edegem, Belgium
[19] Med Univ Vienna, Dept Gastroenterol & Hepatol, Div Internal Med 3, A-1090 Vienna, Austria
[20] McMaster Univ, Dept Internal Med, Hamilton, ON L8S 4L8, Canada
[21] Med Univ Innsbruck, Div Gastroenterol Endocrinol & Metab, Dept Internal Med 1, A-6020 Innsbruck, Austria
[22] Ctr Hosp Univ Montreal, Dept Pharm, Montreal, PQ H2X 3J4, Canada
[23] Free Univ Brussels, Pediat Gastroenterol & Nutr UZBrussels, B-1050 Brussels, Belgium
[24] Ctr Hosp Tourcoing, Serv Univ Malad Infect & Voyageur, F-59208 Tourcoing, France
[25] Hop Bichat Claude Bernard, Serv Malad Infect & Trop, F-75877 Paris, France
[26] Sheba Med Ctr, Dept Gastroenterol & Hepatol, IL-52621 Tel Hashomer, Israel
[27] Icahn Med Sch Mt Sinai, Henry D Janowitz Div Gastroenterol, New York, NY 10029 USA