[1] AOU Careggi, Dept Expt & Clin Med, Largo Brambilla 3, I-50134 Florence, Italy
[2] Mauriziano Umberto I Hosp, Dept HPB & Digest Surg, Largo Filippo Turati 62, I-10128 Turin, Italy
[3] S Orsola Malpighi Univ Hosp, Dept Emergency Surg & Transplants, Via G Massarenti 9, I-40138 Bologna, Italy
[4] AOU Careggi, Dept Oncol, Surg Oncol & Robot, Largo Brambilla 3, I-50134 Florence, Italy
[5] Regina Elena Inst Canc Res, Gen & Hepatopancreatobiliary Surg Unit, Via E Chianesi 53, I-00128 Rome, Italy