Author Contributions: Dr Lin had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Lin. Analysis and interpretation of data: Lin, Niparko, and Ferrucci. Drafting of the manuscript: Lin. Critical revision of the manuscript for important intellectual content: Lin, Niparko, and Ferrucci. Statistical analysis: Lin. Obtained funding: Lin. Administrative, technical, and material support: Lin, Niparko, and Ferrucci. Study supervision: Niparko and Ferrucci.
Financial Disclosure: None reported.
Funding/Support: This work was support by grant K23DC011279 from the National Institutes of Health.
Role of the Sponsors: The funding organization had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
This article was corrected for a typographical error on May 8, 2012.