Accepted for Publication: January 8, 2014.
Published Online: March 24, 2014. doi:10.1001/jamapediatrics.2014.63.
Study concept and design: Gentile, Khoo, Anderson.
Acquisition of data: Li, Khoo.
Analysis and interpretation of data: Gentile, Li, Prot.
Drafting of the manuscript: Gentile, Li, Prot.
Critical revision of the manuscript for important intellectual content: Gentile, Khoo, Anderson.
Statistical analysis: Gentile, Li, Prot, Anderson.
Obtained funding: Khoo.
Administrative, technical, and material support: Gentile, Li, Khoo.
Study supervision: Khoo.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grants from the Ministry of Education and the Media Development Authority of Singapore (Dr Khoo).
Role of the Sponsor: The funders 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.