[1] Policlin San Martino, Dept Gen Surg, Genoa, Italy
[2] Univ Catanzaro, Dept Med & Surg Sci, I-88100 Catanzaro, Italy
[3] IRCCS Osped Policlin San Martino, Acad Unit Obstet & Gynecol, Genoa, Italy
[4] Univ Bari, Dept Biomed Sci & Human Oncol, Unit Gen Surg, Bari, Italy
[5] IRCCS Univ Hosp A Gemelli, Rome, Italy
[6] CORESEARCH, Ctr Outcomes Res & Clin Epidemiol, Pescara, Italy
[7] Univ Insubria, Dept Gen Surg, Varese, Italy
[8] San Camillo Forlanini Hosp, Rome, Italy
[9] A Perrino Hosp, Dept Surg, Brindisi, Italy
[10] Cristo Re Hosp, Rome, Italy