[1] Univ Libre Bruxelles, Erasme Univ Hosp, Dept Gastroenterol Hepatopancreatol & Digest Onco, Brussels, Belgium
[2] Natl & Kapodistrian Univ Athens, Attikon Univ Gen Hosp, Hepatogastroenterol Unit, Med Sch,Propaedeut & Res Inst,Dept Internal Med 2, Athens, Greece