[1] Herlev Univ Hosp, Med Sect, Ctr Digest Dis, DK-2730 Copenhagen, Denmark
[2] Univ Hosp Vienna, Dept Internal Med 3, Vienna, Austria
[3] Charles Univ Prague, Fac Med 1, Gen Hosp, Dept Internal Med, Prague, Czech Republic
[4] IBD Ctr, Prague, Czech Republic
[5] Univ Zagreb, Univ Hosp Rebro, Div Gastroenterol & Hepatol, Zagreb, Croatia
[6] Hvidovre Univ Hosp, Dept Pediat, Copenhagen, Denmark
[7] Ctr Hosp Univ Lille, Dept Hepatogastroenterol, Hop Claude Huriez, Lille, France
[8] TCD, Dept Gastroenterol, Adelaide & Meath Hosp, Dublin, Ireland
[9] Ben Gurion Univ Negev, IL-84105 Beer Sheva, Israel
[10] Soroka Med Ctr, Dept Gastroenterol & Hepatol, IL-84101 Beer Sheva, Israel
[11] Aker Univ Hosp, Dept Med, Oslo, Norway
[12] Univ Oslo, Akershus Univ Hosp, Dept Gl Surg, N-0316 Oslo, Norway
[13] Moscow Reg Res Clin Inst, Dept Gastroenterol, Moscow, Russia
[14] Univ Hosp Maastricht, Dept Gastroenterol & Hepatol, Maastricht, Netherlands