[1] Univ Milan, AM & A Migliavacca Ctr Liver Dis, Div Gastroenterol 1, Dept Med,Fdn IRCCS Ca Granda Osped Maggiore Polic, Milan, Italy
[2] Univ Milan, Div Nephrol & Dialysis, Fdn IRCCS Ca Granda Osped Maggiore Policlin, Milan, Italy
[3] Univ Milan, Div Hyg, Fdn IRCCS Ca Granda Osped Maggiore Policlin, Milan, Italy