Accepted for Publication: December 5, 2013.
Published Online: May 26, 2014. doi:10.1001/jamapediatrics.2013.5306.
Study concept and design: Florin, Shaw, Zorc.
Acquisition, analysis, or interpretation of data: Florin, Kittick, Yakscoe, Zorc.
Drafting of the manuscript: Florin.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Florin.
Obtained funding: Florin.
Administrative, technical, or material support: Shaw, Kittick, Yakscoe.
Study supervision: Shaw, Zorc.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by a Young Investigator Award from the Academic Pediatric Association.
Role of the Sponsor: The Academic Pediatric Association 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: Results of this study were presented at the annual meetings of the Pediatric Academic Societies; April 29, 2012; Boston, Massachusetts; and the American Academy of Pediatrics; October 19, 2012; New Orleans, Louisiana.