[1] Bambino Gesu Pediat Hosp, Liver Unit, Rome, Italy
[2] Hosp Casa Sollievo Sofferenza, IRCCS, Div Gastroenterol, San Giovanni Rotondo, Italy
[3] De Bellis Hosp, IRCCS, Div Gastroenterol, Castellana Grotte, Italy
[4] Bambino Gesu Pediat Hosp, Dept Pathol, Rome, Italy