[1] Univ Bologna, Internal Med, I-40138 Bologna, Italy
[2] Univ Bologna, Semeiot Med, I-40138 Bologna, Italy
[3] Univ Bologna, Liver & Multivisceral Transplant Surg, I-40138 Bologna, Italy
[4] Gen Hosp S Orsola Malpighi, I-40138 Bologna, Italy
[5] Univ Verona, Div Radiol, Verona, Italy
[6] Univ Verona, Div Gastroenterol, Verona, Italy