Accepted for Publication: October 20, 2013.
Published Online: February 10, 2014. doi:10.1001/jamapediatrics.2013.4858.
Study concept and design: Hobbs, Chowdhury, Cleves, Shaw, Witte, Tycko.
Acquisition of data: MacLeod.
Analysis and interpretation of data: Chowdhury, Erickson, Shete, Tycko.
Drafting of the manuscript: Hobbs, Chowdhury, Cleves, Erickson, MacLeod, Shaw, Witte, Tycko.
Critical revision of the manuscript for important intellectual content: Chowdhury, Cleves, MacLeod, Shaw, Shete, Witte, Tycko.
Statistical analysis: Erickson.
Obtained funding: Chowdhury, Tycko.
Administrative, technical, and material support: Chowdhury, Cleves, MacLeod, Shaw, Witte.
Study supervision: Hobbs, Shete.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported by the Centers for Disease Control and Prevention (grant 5U01 DD000491), the Eunice Kennedy Shriver National Institute of Child Health and Human Development (grant R01 HD039054 to Dr Hobbs and grant P01 HD035897 to Dr Tycko), and the Arkansas Biosciences Institute.
Role of the Sponsor: The funding agencies had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The views expressed herein are solely those of the authors and do not reflect the official views or positions of the Centers for Disease Control and Prevention or the Eunice Kennedy Shriver National Institute of Child Health and Human Development.
Additional Contributions: We gratefully acknowledge Zuzana Gubrij, MA, and Ashley Block, MA, from the Department of Pediatrics, University of Arkansas for Medical Sciences, College of Medicine, and Phaedra Yount, MA, and John Gregan, MA, from the Arkansas Children's Hospital Research Institute, in Little Rock, for their support with the design, copy editing, and formatting of the article. They were not compensated from a funding sponsor.