[1] Sheba Med Ctr, Dept Gastroenterol, IL-5296100 Ramat Gan, Israel
[2] Tel Aviv Univ, Sackler Med Sch, Tel Aviv, Israel
[3] Ben Gurion Univ Negev, Dept Gastroenterol & Hepatol, Beer Sheva, Israel
[4] Univ Ioannina, Div Gastroenterol, Ioannina, Greece
[5] Venizeleio Gen Hosp, Dept Gastroenterol, Iraklion, Greece
[6] Evangelismos Med Ctr, Dept Gastroenterol 1, Athens, Greece
[7] Univ Hosp Heraklion, Dept Gastroenterol, Iraklion, Greece
[8] Erasmus MC, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[9] Inst Invest Biomed Ourense Pontevedra Vigo, Dept Gastroenterol, Xerencia Xest Integrada Vigo, Vigo, Spain
[10] Zvezdara Univ Clin Ctr, Dept Gastroenterol & Hepatol, Zvezdara, Serbia
[11] Univ Belgrade, Med Fac, Belgrade, Serbia
[12] Cent IBD Clin, Nicosia, Cyprus
[13] Humanitas Res Hosp, Dept Gastroenterol, IBD Ctr, Milan, Italy