Accepted for Publication: August 13, 2014.
Published Online: November 10, 2014. doi:10.1001/jamapediatrics.2014.2085.
Study concept and design: Kastenberg, Lee, Gould, Sylvester.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Kastenberg, Lee, Sylvester.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Kastenberg, Lee, Sylvester.
Obtained funding: Sylvester.
Administrative, technical, or material support: Lee, Gould, Sylvester.
Study supervision: Lee, Gould, Sylvester.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project was supported in part by grant HS000028 from the Agency for Healthcare Research and Quality, the Jack and Marion Euphrat Fellowship in Pediatric Translational Medicine, and grant UL1 RR025744 from the Stanford Clinical and Translational Science Award.
Role of the Funder/Sponsor: The funding organizations 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.