Author Contributions: Dr Harper 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: Harper, Kaufman.
Acquisition of data: Rushani.
Analysis and interpretation of data: Harper, Rushani, Kaufman.
Drafting of the manuscript: Harper, Rushani, Kaufman.
Critical revision of the manuscript for important intellectual content: Harper, Rushani, Kaufman.
Statistical analysis: Harper, Rushani.
Obtained funding: Harper, Rushani, Kaufman.
Study supervision: Kaufman.
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: Dr Harper was supported by a career award from the Fonds de la Recherche en Santé du Québec. Dr Kaufman and Ms Rushani were supported by the Canada Research Chairs program.
Role of the Sponsors: The sources of support had no control over the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.