Published Online: January 19, 2015. doi:10.1001/jamainternmed.2014.7533.
Study concept and design: Cigolle, Min, Lee, Gure, Alexander, Blaum.
Acquisition, analysis, or interpretation of data: Cigolle, Ha.
Drafting of the manuscript: Cigolle, Min, Alexander.
Critical revision of the manuscript for important intellectual content: Cigolle, Ha, Min, Lee, Gure, Blaum.
Statistical analysis: Cigolle, Ha, Min.
Obtained funding: Cigolle, Gure.
Administrative, technical, or material support: Cigolle, Lee, Alexander.
Study supervision: Cigolle, Blaum.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Cigolle is supported by grant K08 AG031837 from the National Institute on Aging.
Role of the Funder/Sponsor: The funding source 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.