Accepted for Publication: July 22, 2013.
Published Online: November 13, 2013. doi:10.1001/jamasurg.2013.3959.
Study concept and design: Helyer, Swallow, Law, Paszat, Chau, Crane, Sano, Coburn.
Acquisition of data: Brar, Mahar, Helyer, Paszat, Seevaratnam, Cardoso, Dixon, Yohanathan, Lourenco, Bekaii-Saab, Chau, Church, Coit, Crane, Earle, Mansfield, Miner, Porter, Posner, Prachand, Wong, Coburn.
Analysis and interpretation of data: Brar, Mahar, Paszat, Cardoso, McLeod, Dixon, Bocicariu, Bekaii-Saab, Chau, Coit, Earle, Mansfield, Marcon, Noh, Porter, Posner, Van de Velde, Wong, Coburn.
Drafting of the manuscript: Brar, Helyer, Law, Cardoso, Dixon, Yohanathan, Bocicariu, Bekaii-Saab, Posner, Van de Velde, Coburn.
Critical revision of the manuscript for important intellectual content: Brar, Mahar, Swallow, Paszat, Seevaratnam, Cardoso, McLeod, Dixon, Lourenco, Bocicariu, Bekaii-Saab, Chau, Church, Coit, Crane, Earle, Mansfield, Marcon, Miner, Noh, Porter, Prachand, Sano, Wong, Coburn.
Statistical analysis: Brar, Law, Seevaratnam, Cardoso, Dixon, Bocicariu, Coburn.
Obtained funding: Paszat, Coburn.
Administrative, technical, and material support: Brar, Mahar, Law, Cardoso, Dixon, Yohanathan, Marcon, Miner, Porter, Prachand, Coburn.
Study supervision: Paszat, McLeod, Lourenco, Coit, Noh, Sano, Van de Velde, Coburn.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grant 019325 from the Canadian Cancer Society, the Ontario Ministry of Health and Long-Term Care (Drs Coburn and Paszat), and the Hanna Family Research Chair in Surgical Oncology (Dr Law).
Role of the Sponsor: The fundings sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Previous Presentations: This paper was presented at the Gastrointestinal Cancers Symposium 2012; January 19, 2012; San Francisco, California, and the Society of Surgical Oncology Annual Cancer Assembly; March 21, 2012; Orlando, Florida.
Additional Contributions: The National Health Service provided funding to the National Institute for Health Research’s Biomedical Research Centre (Dr Chau).