Submitted for Publication: November 21, 2012; final revision received January 1, 2013; accepted January 25, 2013.
Author Contributions: Dr Nichols had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Drs Yoo and Barrett contributed equally to this manuscript: Study concept and design: Nichols, Fung, and Yoo. Acquisition of data: Nichols, Chow, Tan, Rajakumar, Rizzo, Kwan, Wehrli, and Barrett. Analysis and interpretation of data: Nichols, Palma, Fung, Wehrli, Winquist, Koropatnick, Mymryk, and Barrett. Drafting of the manuscript: Nichols, Mymryk, and Barrett. Critical revision of the manuscript for important intellectual content: Nichols, Palma, Chow, Tan, Rajakumar, Rizzo, Fung, Kwan, Wehrli, Winquist, Koropatnick, Mymryk, Yoo, and Barrett. Statistical analysis: Nichols and Palma. Obtained funding: Nichols and Yoo. Administrative, technical, and material support: Tan, Fung, Wehrli, Koropatnick, Yoo, and Barrett. Study supervision: Nichols, Mymryk, Yoo, and Barrett.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by a London Regional Cancer Program grant.