Published Online: January 21, 2013. doi:10.1001/jamainternmed.2013.1880
Author Contributions: Ms Swenor had full access to all of 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: Swenor, Ramulu, Friedman, and Lin. Acquisition of data: Ramulu, Willis, and Friedman. Analysis and interpretation of data: Swenor, Willis, Friedman, and Lin. Drafting of the manuscript: Swenor. Critical revision of the manuscript for important intellectual content: Swenor, Ramulu, Willis, Friedman, and Lin. Statistical analysis: Swenor, Willis, Friedman, and Lin. Study supervision: Ramulu, Friedman, and Lin.
Conflict of Interest Disclosures: Dr Lin is a consultant to Pfizer and Cochlear Corp.
Funding/Support: This work was supported by grant T32AG000247 from the National Institutes of Aging, Research to Prevent Blindness Special Scholar Award, and NIH grant EY018595. Dr Lin was supported by NIH K23DC011279 and a Triological Society/American College of Surgeons Clinician Scientist Award.
Role of the Sponsors: The funders 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.