Accepted for Publication: April 20, 2011.
Author Contributions: Dr Kuo had full access to all 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: Kuo, Agrawal, Berry, and Casey. Acquisition of data: Kuo. Analysis and interpretation of data: Kuo, Cohen, and Berry. Drafting of the manuscript: Kuo, Berry, and Casey. Critical revision of the manuscript for important intellectual content: Kuo, Cohen, Agrawal, Berry, and Casey. Statistical analysis: Kuo, Cohen, and Berry. Obtained funding: Kuo.
Financial Disclosure: None reported.
Funding/Support: Dr Kuo is supported by the Marion B. Lyon New Scientist Award, by the Arkansas Biosciences Institute, and by grant KL2RR029883 from the National Center for Research Resources.
Role of the Sponsors: The funding bodies had no role in the design or conduct of the study; collection, analysis, or interpretation of the data; or preparation, review, or approval of the manuscript.
Previous Presentation: The study findings were presented in part at the 2010 Pediatric Academic Societies' Annual Meeting; May 4, 2010; Vancouver, British Columbia, Canada.