[1] Semmelweis Univ, Dept Internal Med 3, H-1088 Budapest, Hungary
[2] Semmelweis Univ, Dept Internal Med 1, H-1088 Budapest, Hungary
[3] Semmelweis Univ, Dept Internal Med 2, H-1088 Budapest, Hungary
[4] Hungarian Acad Sci, Gastroenterol Res Unit, Budapest, Hungary
[5] Hungarian Acad Sci, Res Lab Pediat & Nephrol, Budapest, Hungary
[6] Univ Szeged, Dept Microbiol & Immunobiol, Szeged, Hungary