[1] Chaim Sheba Med Ctr, Dept Gastroenterol, IL-52621 Tel Hashomer, Israel
[2] Hosp Huriez, Dept Gastroenterol & Hepatol, Lille, France
[3] John Radcliffe Hosp, Dept Infect Dis, Oxford OX3 9DU, England
[4] Katholieke Univ Leuven Hosp, Dept Internal Med, Louvain, Belgium
[5] Imelda Hosp, Dept Gastroenterol, Clin Res Ctr, Bonheiden, Belgium
[6] Hosp Badalona Germans Trias & Pujol, Dept Gastroenterol & Hepatol, Badalona, Spain
[7] Rambam Med Ctr, Dept Gastroenterol, Haifa, Israel
[8] Med Univ, Dept Gastroenterol & Hepatol, Vienna, Austria
[9] Bernard Pridan Lab Mol Biol Infect Dis, Tel Aviv, Israel
[10] Univ Hosp, Dept Gastroenterol, Innsbruck, Austria
[11] Hosp St Louis, Dept Gastroenterol, Paris, France
[12] Univ Hosp, Dept Gastroenterol, Antwerp, Belgium
[13] Univ London St Georges Hosp, Dept Gastroenterol, London, England
[14] Univ Hosp, Dept Gastroenterol, Vienna, Austria
[15] Robert Bosch Krankenhaus, Dept Gastroenterol, Stuttgart, Germany
[16] John Radcliffe Hosp, Dept Gastroenterol, Oxford OX3 9DU, England
[17] Univ Hosp, Dept Gastroenterol, Louvain, Belgium
[18] Univ Zagreb, Univ Hosp Rebro, Dept Gastroenterol, Zagreb, Croatia
[19] Med Univ, Dept Internal Med, Innsbruck, Austria