Accepted for Publication: February 22, 2011.
Published Online: May 16, 2011. doi:10.1001/archsurg.2011.121
Author Contributions:Study concept and design: Chu, Fox, and Novick. Acquisition of data: Chu, Fox, Kiaii, Quantz, Myers, Hewitt, and Novick. Analysis and interpretation of data: Chu, Stitt, Fox, Guo, and Novick. Drafting of the manuscript: Chu and Novick. Critical revision of the manuscript for important intellectual content: Chu, Stitt, Fox, Kiaii, Quantz, Guo, Myers, Hewitt, and Novick. Statistical analysis: Stitt. Administrative, technical, and material support: Chu, Fox, Kiaii, Quantz, Guo, Myers, Hewitt, and Novick. Study supervision: Novick.
Financial Disclosure: None reported.
Funding/Support: This study was supported by internal research funds from the Division of Cardiac Surgery, University of Western Ontario.
Disclaimer: Internal research funds of the Division of Cardiac Surgery at the University of Western Ontario covered the salaries of the clinical research associates who run our clinical database as well as biostatistical consultation fees. All data collection, analysis, and interpretation as well as the writing of this report were performed by the study authors, without the involvement of any outside party.
Additional Contributions: Elizabeth Millar assisted in manuscript preparation and Vladimir Hachinski, CM, MD, FRCPC, DSc, reviewed an earlier version of the manuscript.