[1] Univ Bari, Dept Gen Surg & Liver Transplantat, Bari, Italy
[2] Galliera Hosp, Coloproctol Unit, Genoa, Italy
[3] Univ Padua, Dept Surg & Oncol Sci, Sect Surg Clin 2, Padua, Italy
[4] Univ Roma La Sapienza, Dept Surg Sci, Rome, Italy
[5] Moscati Hosp, Dept Emergency Surg, Avellino, Italy