[1] SUNY Stony Brook, Dept Surg, Stony Brook, NY 11794 USA
[2] Univ Minnesota, Div Colon & Rectal Surg, Pelv Floor Ctr, Minneapolis, MN USA
[3] Med Univ Ohio, Dept Surg, Toledo, OH USA
[4] Cleveland Clin Fdn, Dept Colorectal Surg, Weston, FL USA
[5] Pelvic Floor Ctr, Montecchio Emilia, Italy
[6] Pordenone Gen Hosp, Colorectal Unit, Pordenone, Italy
[7] Enddarm Zenturm Mannheim, Mannheim, Germany
[8] Frankenwaldklin Kronach, Dept Visceral Surg, Kronach, Germany
[9] St James Univ Hosp, Dept Surg, Leeds, W Yorkshire, England
[10] Univ London, Imperial Coll, St Marks Hosp, Harrow, Middx, England
[11] Hop Hotel Dieu, Clin Chirurg, Inst Malad Apparell Digest, Nantes, France
[12] Natl Univ Singapore Hosp, Minimally Invas Surg Ctr, Singapore, Singapore
[13] St Elizabeth Hosp, Dept Coloproctol & Pelv Dis, Vienna, Austria
[14] Karolinska Univ Hosp, Stockholm, Sweden