Accepted for Publication: April 7, 2013.
Published Online: September 23, 2013. doi:10.1001/jamapediatrics.2013.2632.
Study concept and design: Y. Huang, Hauck, Signore, Raju, T. T.-K. Huang, Fein.
Acquisition of data: Y. Huang, Fein.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Y. Huang, Hauck, Fein.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Y. Huang, Signore, Yu.
Administrative, technical, and material support: Y. Huang, Signore, T. T.-K. Huang.
Study supervision: Y. Huang, Hauck.
Conflict of Interest Disclosures: None reported.
Funding/Support: The data collection was supported by several agencies in the US Department of Health and Human Services.
Role of the Sponsor: The funding organizations approved the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: Kawai O. Tanabe, MPH, provided assistance with manuscript preparation.