Author Contributions: Dr Ilie had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Ilie, Boak, Asbridge, Cusimano.
Acquisition of data: Boak, Adlaf.
Analysis and interpretation of data: Ilie, Boak, Adlaf, Cusimano.
Drafting of the manuscript: Ilie, Boak.
Critical revision of the manuscript for important intellectual content: Ilie, Boak, Adlaf, Asbridge, Cusimano.
Statistical analysis: Ilie.
Obtained funding: Asbridge, Cusimano.
Administrative, technical, or material support: Boak, Adlaf.
Study supervision: Cusimano.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This work was supported by a team grant from the Strategic Teams in Applied Injury Research Program of the Canadian Institutes of Health Research. Additional funding was obtained from a grant from AUTO21, a member of the Networks of Centres of Excellence program that is administered and funded by the Natural Sciences and Engineering Research Council, the Canadian Institutes of Health Research, and the Social Sciences and Humanities Research Council, in partnership with Industry Canada.
Role of the Sponsor: The funding organizations 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.
Additional Contributions: We thank Robert E. Mann, PhD, Hayley Hamilton, PhD, and Jürgen Rehm, PhD (all 3 with the Social and Epidemiological Research, Centre for Addiction and Mental Health, Toronto, Ontario, Canada), for their contributions to the manuscript. None received compensation for his or her contribution; however, Drs Mann, Hamilton, and Rehm acknowledge receiving ongoing funding/support from the Ontario Ministry of Health and Long-Term Care.