[1] Businco Hosp, Dept Oncol Radiol, Div Intervent Radiol, Cagliari, Italy
[2] Univ Sassari, Dept Med Surg & Expt Sci, Unit Expt Pathol & Oncol, Sassari, Italy
[3] Sapienza Univ Rome, St Andrea Univ Hosp, Dept Med & Surg Sci & Translat Med, Rome, Italy
[4] Univ Sassari, Unit Gen Surg 2, Clin Chirurg, Dept Med Surg & Expt Sci, Vle San Pietro 43, I-07100 Sassari, Italy