Accepted for Publication: August 9, 2013.
Published Online: November 25, 2013. doi:10.1001/jamapediatrics.2013.3924.
Study concept and design: Marom, Tan, Wilkinson, Freeman, Chonmaitree.
Acquisition of data: Marom, Tan, Wilkinson.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Marom, Tan, Wilkinson, Freeman, Chonmaitree.
Critical revision of the manuscript for important intellectual content: Marom, Tan, Pierson, Chonmaitree.
Statistical analysis: Tan, Wilkinson, Pierson, Freeman.
Obtained funding: Wilkinson, Chonmaitree.
Study supervision: Wilkinson, Chonmaitree.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was conducted with support from National Institutes of Health grants R01DC005841 and R01DC005841-09S1. It also received support from the Institute for Translational Sciences at The University of Texas Medical Branch through Clinical and Translational Science Award UL1TR000071 from the National Center for Advancing Translational Sciences.
Role of the Sponsor: The National Institutes of Health, Institute for Translational Sciences, and National Center for Advancing Translational Sciences 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.
Additional Contributions: David P. McCormick, MD, reviewed the manuscript and provided valuable suggestions. He received no financial compensation.