Accepted for Publication: November 7, 2013.
Published Online: January 6, 2014. doi:10.1001/jamaneurol.2013.5798.
Study concept and design: Chan, McGovern, Sheehy, Zacharia, Mikell, McKhann.
Acquisition of data: Chan, McGovern, Sheehy.
Analysis and interpretation of data: Chan, McGovern, Brown, Sheehy, Zacharia, Bruce, Ford.
Drafting of the manuscript: Chan, McGovern.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Chan, McGovern, Brown, Sheehy, Zacharia, Bruce.
Administrative, technical, and material support: Ford.
Study supervision: McGovern, Sheehy, Zacharia, Mikell, McKhann.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by a grant from the Doris Duke Charitable Foundation to Columbia University to fund Clinical Research Fellows Mr Chan and Dr Sheehy.
Role of the Sponsors: The Doris Duke Charitable Foundation 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.