[1] Univ Cagliari, AOU Cagliari, Dept Surg, Colorectal Surg Ctr, Cagliari, Italy
[2] IRCCS Ist Tumori Giovanni Paolo II, Dept Surg Oncol, Bari, Italy
[3] Univ Padua, Dept Surg Oncol & Gastroenterol Sci, Padua, Italy
[4] Fdn Giovanni Pascale IRCCS, Ist Nazl Studio & Cura Tumori, Abdominal Oncol Dept, Colorectal Surg Oncol, Naples, Italy
[5] Catholic Univ, Fdn Policlin Univ Agostino Gemelli IRCCS, Gen Surg Unit, Rome, Italy
[6] Fdn IRCCS Ist Nazl Tumori, Dept Surg, Milan, Italy