[1] Univ Bari, Dept Emergency & Organ Transplantat, I-70124 Bari, Italy
[2] Vittorio Emanuele Hosp, Dept Surg & Oncol, Catania, Italy
[3] Univ Naples Federico II, Dept Gen & Oncol Surg, Naples, Italy
[4] Azienda Osped S Anna & S Sebastiano Caserta, Coloproctol Unit, Caserta, Italy
[5] Osped Ignazio Veris Delli Ponti, Dept Gen Surg, Scorrano, Italy
[6] IRCCS Bellis, Dept Surg, Bari, Italy
[7] Univ Catania, Policlin G Rodolico, Dept Gen Surg, Catania, Italy
[8] Brotzu Hosp, Dept Gen Surg, Cagliari, Italy
[9] Univ Catania, Garibaldi Nesima Hosp, Colonproctol Unit, Catania, Italy