Author Contributions: Drs Zaryhanski and Abou-Setta had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Zarychanski, Abou-Setta, Turgeon, McIntyre, Fergusson.
Acquisition of data: Zarychanski, Abou-Setta, Houston.
Analysis and interpretation of data: Zarychanski, Abou-Setta, Turgeon, McIntyre, Marshall, Fergusson.
Drafting of the manuscript: Zarychanski, Abou-Setta, Turgeon, McIntyre, Fergusson.
Critical revision of the manuscript for important intellectual content: Zarychanski, Abou-Setta, Turgeon, Houston, McIntyre, Marshall, Fergusson.
Statistical analysis: Zarychanski, Abou-Setta.
Administrative, technical, or material support: Zarychanski, Abou-Setta.
Study supervision: Zarychanski, Abou-Setta.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Drs Zarychanski and McIntyre reported that they receive salary support from the Canadian Institutes of Health Research (CIHR). Dr Turgeon reported that he receives salary support from the Fonds de la Recherche du Québec - Santé du (FRQ-S). Dr McIntyre reported that she has received unrestricted grant support from Bristol-Myers Squibb and Abbott Laboratories.
Additional Contributions: We thank Jaro Wex, MD, PhD (German, Russian, Ukrainian language translations; PharmArchitecture Ltd), Michele Shemilt, BSc, MSc candidate (French language translations; Université Laval, Québec City, Québec, Canada), Dongfeng Sun, MD (Chinese language translations; CancerCare Manitoba, Winnipeg, Canada) for their assistance in this review. No specific compensation was provided to these individuals.
This article was corrected for errors on March 29, 2013.