[1] Univ Campania Luigi Vanvitelli, Dept Adv Med & Surg Sci, Naples, Italy
[2] A Cardarelli Hosp, Dept Surg 3, Naples, Italy
[3] Univ Autonoma Barcelona, Vall dHebron Univ Hosp, Colorectal Surg, Barcelona, Spain
[4] Groene Hart Hosp, Dept Surg, Gouda, Netherlands
[5] Imperial Coll NHS Healthcare, Dept Urogynaecol, London, England
[6] Univ Hosp Pisa, Pelv Floor Multidisciplinary Clin Ctr, Proctol & Perineal Surg Unit Proctol, Pisa, Italy
[7] Med Univ Vienna, Dept Surg, Vienna, Austria