[1] Univ Rome La Sapienza, Inst Gastroenterol 2, I-00185 Rome, Italy
[2] Univ Rome La Sapienza, Inst Radiol Sci 2, I-00185 Rome, Italy
[3] Univ Parma, Inst Infect Dis, I-43100 Parma, Italy
[4] Univ Parma, Inst Radiol Sci, I-43100 Parma, Italy
[5] Univ Milan, Inst Internal Med, Milan, Italy
[6] Osped Maggiore, IRCCS, Dept Radiol, Milan, Italy
[7] Univ Milan, Osped Maggiore, IRCCS, Emergency Surg, Milan, Italy
[8] Univ La Sapienza, Inst Gen Surg 1, Rome, Italy