[1] Peter MacCallum Canc Ctr, Dept Colorectal Surg, Melbourne, Vic, Australia
[2] Royal Prince Alfred Hosp, Dept Colorectal Surg, Surg Outcomes Res Ctr, Sydney, NSW, Australia
[3] Royal Prince Alfred Hosp, Inst Acad Surg, Sydney, NSW, Australia
[4] Univ Sydney, Fac Med & Hlth, Cent Clin Sch, Sydney, NSW, Australia
[5] Cork Univ Hosp, Dept Surg, Cork, Ireland
[6] St Marks Hosp, Dept Colorectal Surg, London, England
[7] Christchurch Hosp, Dept Colorectal Surg, Christchurch, New Zealand
[8] Univ Texas MD Anderson Canc Ctr, Dept Colon & Rectal Surg, Houston, TX USA