Accepted for Publication: April 13, 2011.
Author Contributions:Study concept and design: Weintraub, Davatzikos, Siderowf, Duda, Wolk, and Clark. Acquisition of data: Koka, Davatzikos, Duda, and Moberg. Analysis and interpretation of data: Weintraub, Doshi, Davatzikos, Wolk, and Xie. Drafting of the manuscript: Weintraub, Koka, and Davatzikos. Critical revision of the manuscript for important intellectual content: Doshi, Davatzikos, Siderowf, Duda, Wolk, Moberg, Xie, and Clark. Statistical analysis: Weintraub, Davatzikos, and Xie. Obtained funding: Davatzikos and Clark. Administrative, technical, and material support: Weintraub, Doshi, Koka, Davatzikos, Siderowf, Wolk, and Moberg. Study supervision: Weintraub and Davatzikos.
Financial Disclosure: None reported.
Funding/Support: This study was supported by health research grant SAP4100027296 from the Department of Health of the Commonwealth of Pennsylvania from the Tobacco Master Settlement Agreement under Act 2001-77; by P50 NS053488 from the National Institute of Neurological Disorders and Stroke (Penn Udall Center); and by grants R01-14971 and P30-AG10124 from the National Institute on Aging.
Role of the Sponsors: The funding sponsors only provided monetary support and did not participate in the design and conduct of the study; in the collection, management, analysis, and interpretation of data; or in the preparation, review, or approval of the manuscript.
This article was corrected for errors on December 12, 2011.