Accepted for Publication: April 12, 2012.
Published Online: July 9, 2012. doi:10.1001/archpediatrics.2012.1195
Author Contributions:Study concept and design: Li, To, Parkin, Anderson, and Guttmann. Acquisition of data: Li and Guttmann. Analysis and interpretation of data: Li, Parkin, and Guttmann. Drafting of the manuscript: Li and Guttmann. Critical revision of the manuscript for important intellectual content: Li, To, Parkin, Anderson, and Guttmann. Statistical analysis: Li, To, and Guttmann. Obtained funding: Li and Guttmann. Administrative, technical, and material support: Li and Guttmann. Study supervision: To, Anderson, and Guttmann.
Financial Disclosure: None reported.
Funding/Support: Dr Li received an Academic Pediatric Association/Agency for Healthcare Research and Quality Young Investigator Award for this study, Dr To is supported by the Dales Award, University of Toronto, Dr Guttmann is a recipient of a Canadian Institutes of Health Research New Investigator Award and a Canadian Child Health Clinician Scientist Career Enhancement Program Award, and the Pediatric Outcomes Research Team is supported by a grant from the Hospital for Sick Children Foundation. This study was performed at the Institute for Clinical Evaluative Sciences, which is funded by an annual grant from the Ontario Ministry of Health and Long-Term Care.
Disclaimer: The opinions, results, and conclusions reported in this article are those of the authors and are independent from all funding sources. No endorsement by the Institute for Clinical Evaluative Sciences or the Ontario Ministry of Health and Long-Term Care is intended or should be inferred.
Additional Contributions: We thank Kelvin Lam, MSc, data analyst at the Institute for Clinical Evaluative Sciences, for extracting the preliminary health services data.