Study concept and design: Walsh, Ginsburg.
Acquisition of data: Walsh, Fung, Ginsburg.
Analysis and interpretation of data: Walsh, Ginsburg.
Drafting of the manuscript: Walsh.
Critical revision of the manuscript for important intellectual content: Walsh, Fung, Ginsburg.
Statistical analysis: Walsh.
Administrative, technical, or material support: Fung, Ginsburg.
Study supervision: Ginsburg.
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 Walsh was funded by a Canadian Institute of Health Research Canadian Child Health Clinician Scientist Program doctoral fellowship and a Hospital for Sick Children, Department of Paediatrics fellowship grant.
Role of the Sponsor: The Canadian Institutes of Health Research and the Hospital for Sick Children had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Previous Presentation: The abstract of an earlier version of this article was presented as a poster at the 2012 Association of American Medical Colleges’ Research in Medical Education Meeting.
Additional Contributions: We gratefully acknowledge Peter Church, MD (Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada), for assistance with data analysis. Dr Church did not receive compensation.