title: Reply to C. Zhuang et al.
authors.affiliation: St Mark's Hospital, Harrow; and Imperial College, London, United Kingdom robin.kennedy@nhs.net.
authors.forename: Robin H
authors.initials: RH
authors.lastname: Kennedy
authors.affiliation: University of Oxford, Oxford, United Kingdom.
authors.forename: E Anne
authors.initials: EA
authors.lastname: Francis
authors.affiliation: Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom.
authors.forename: Rose
authors.initials: R
authors.lastname: Wharton
authors.affiliation: Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, United Kingdom.
authors.forename: Philip
authors.initials: P
authors.lastname: Quirke
authors.affiliation: Leeds Institute of Cancer and Pathology, University of Leeds, Leeds, United Kingdom.
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: West
authors.affiliation: United Kingdom Centre for Surgical Research; and University of Bristol and University Hospitals Bristol, National Health Service Foundation Trust, Bristol, United Kingdom.
authors.forename: Jane M
authors.initials: JM
authors.lastname: Blazeby
authors.affiliation: Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom.
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Dutton
mesh_terms: D015179:Colorectal Neoplasms / Q000601:surgery*; D013505:Digestive System Surgical Procedures / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male