Published Online: June 10, 2013. doi:10.1001/jamainternmed.2013.7060.
Study concept and design: Lam and Steinman.
Acquisition of data: Steinman.
Analysis and interpretation of data: Lam, Miao, and Steinman.
Drafting of the manuscript: Lam.
Critical revision of the manuscript for important intellectual content: Lam,
Miao, and Steinman.
Statistical analysis: Miao.
Obtained funding: Steinman.
Administrative, technical, and material support: Steinman.
Study supervision: Steinman.
Conflict of Interest Disclosures: None
Funding/Support: This research was supported by
grant RC1-AG036377 from the National Institute on Aging
and grant 1K23-AG030999 from the National Institute on
Aging and the American Federation for Aging
Role of the Sponsors: The funders had no role in the design and conduct of the
study; collection, management, analysis, and interpretation of the data; and preparation, review, or
approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: The authors thank Kathy Z. Fung, MS, of the San Francisco
VA Medical Center for her assistance compiling data for this manuscript and the residents of the
Primary Medical Education Program (PRIME) at the University of California, San Francisco and the San
Francisco VA Medical Center for their feedback on manuscript drafts. None of these persons received
compensation for their assistance with this manuscript beyond that earned in the course of their
standard academic duties.