Submitted for Publication: November 25, 2013; accepted January 14, 2014.
Published Online: May 1, 2014. doi:10.1001/jamaoto.2014.562.
Study concept and design: Mohan, Flis.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Mohan.
Critical revision of the manuscript for important intellectual content: All authors.
Administrative, technical, or material support: Mohan.
Study supervision: Flis, O'Leary.
Conflict of Interest Disclosures: None reported.