Accepted for Publication: June 19, 2012.
Published Online: November 26, 2012. doi:10.1001/jamaneurol.2013.597
Author Contributions:Study concept and design: Ziegler, Wonderlick, and Growdon. Acquisition of data: Ziegler, Wonderlick, Ashourian, Hansen, Young, Murphy, and Koppuzha. Analysis and interpretation of data: Ziegler, Wonderlick, Ashourian, Hansen, Young, Murphy, Koppuzha, and Corkin. Drafting of the manuscript: Ziegler, Wonderlick, and Corkin. Critical revision of the manuscript for important intellectual content: Ziegler, Wonderlick, and Corkin. Statistical analysis: Ziegler. Obtained funding: Corkin. Administrative, technical, and material support: Ashourian, Young, Koppuzha, and Growdon.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported by grants AG021525, DA022759-03, GM0007484, K23-AG22509, T32 GM007484, T32 MH082718, and T90 DA022759 from the National Institutes of Health and by the Health Sciences and Technology Martinos Catalyst Fund. The Athinoula A. Martinos Imaging Center at Massachusetts Institute of Technology's McGovern Institute for Brain Research is supported in part by a generous gift from Pat and Lore McGovern.