[1] Papageorgiou Gen Hosp, Dept Gen Surg, Thessaloniki, Greece
[2] McMaster Univ, Dept Surg, Div Gen Surg, Hamilton, ON, Canada
[3] Metaxa Mem Canc Hosp, Dept Surg 1, Piraeus, Greece
[4] Univ Ioannina, Dept Primary Educ, Sch Educ, Ioannina, Greece
[5] IRCCS San Raffaele Sci Inst, Coloproctol & Inflammatory Bowel Dis Unit, Milan, Italy
[6] Patient Representat, Nottingham, England
[7] City Hope Natl Med Ctr, Dept Surg, Duarte, CA USA
[8] Papageorgiou Gen Hosp, Dept Anesthesiol, Thessaloniki, Greece
[9] Nottingham Univ Hosp NHS Trust, Dept Surg, Nottingham, England
[10] Univ Autonoma Barcelona, Vall Hebron Univ Hosp, Colorectal Surg Unit, Barcelona, Spain
[11] Univ Della Campania Luigi Vanvitelli, Dept Adv Med & Surg Sci, Naples, Italy
[12] Natl & Kapodistrian Univ Athens, Sch Med, Laiko Gen Hosp, Dept Internal Med 1, Athens, Greece
[13] Royal Devon Univ Healthcare NHS Fdn Trust, Dept Surg, Exeter, England
[14] Mt Sinai Hosp, Dept Colorectal Surg, New York, NY USA
[15] Univ Basel, Univ Hosp Basel, Div Infect Dis, Basel, Switzerland
[16] Univ Basel, Univ Hosp Basel, Hosp Epidemiol, Basel, Switzerland
[17] Univ Hosp Basel, Dept Clin Res, Basel, Switzerland
[18] Univ Otago, Otago Med Sch, Dept Surg Sci, Dunedin, New Zealand
[19] Univ Otago, Otago Med Sch, Dept Surg Sci, Surg Outcomes Res Ctr SOuRCe, Dunedin, New Zealand
[20] Busto Arsizio Circolo Hosp ASST Valle Olona, Dept Gen Surg, Busto Arsizio, Italy
[21] Univ Politecn Marche, Dept Gen Surg, Ancona, Italy
[22] Univ Seville, Univ Hosp Virgen Macarena, Dept Gen & Digest Surg, Seville, Spain
[23] Hosp Quironsalud Sagrado Corazon, Unit Gen & Digest Surg, Seville, Spain
[24] EAES Guidelines Subcomm, Veldhoven, Netherlands