Author Contributions: Dr Scolnik 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: Scolnik, Coates, Stephens, Da Silva, Lavine, Schuh.
Acquisition of data: Scolnik.
Analysis and interpretation of data: Scolnik, Stephens, Schuh.
Drafting of the manuscript: Scolnik, Coates, Schuh, Lavine.
Critical revision of the manuscript for important intellectual content: Scolnik, Coates, Stephens, Da Silva, Lavine, Schuh.
Statistical analysis: Stephens.
Obtained funding: Scolnik, Schuh.
Administrative, technical, or material support: Scolnik, Coates, Da Silva, Schuh.
Study supervision: Scolnik, Schuh.
Financial Disclosures: None reported.
Funding/Support: This study was funded as a peer-reviewed grant by the Physicians' Services Incorporated Foundation of Ontario.
Role of the Sponsor: The funding organization had no role in design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.
Previous Presentation: This study was presented as an invited platform presentation at the Pediatric Academic Societies meeting in Washington, DC, in May 2005.
Acknowledgment: We are indebted to our research nurses Rita Arseneault, Lourdes Domingo-Guilarte, Robin Hoff, and Sasha Tuuha, our research nurses and the medical and nursing staff of our department for their collaboration, and to Violeta Dukic for typing the manuscript.