Accepted for Publication: August 13, 2012.
Published Online: January 7, 2013. doi:10.1001/2013.jamaneurol.340
Author Contributions:Study concept and design: Hart, Kraut, Womack, Bartz, Conover, and Cullum. Acquisition of data: Hart, Didehbani, Bartz, Mansinghani, Lu, and Cullum. Analysis and interpretation of data: Hart, Kraut, Womack, Strain, Didehbani, Bartz, Mansinghani, and Cullum. Drafting of the manuscript: Hart, Kraut, Bartz, and Cullum. Critical revision of the manuscript for important intellectual content: Hart, Kraut, Womack, Strain, Didehbani, Bartz, Conover, Mansinghani, Lu, and Cullum. Statistical analysis: Hart, Womack, Strain, Didehbani, Bartz, and Mansinghani. Obtained funding: Hart, Bartz, and Conover. Administrative, technical, and material support: Hart, Didehbani, Conover, Mansinghani, and Lu. Study supervision: Hart, Kraut, and Cullum.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the BrainHealth Institute for Athletes at the Center for BrainHealth, a research center at The University of Texas at Dallas, and in part by grant 5K23AG030006 from the National Institute on Aging.
Additional Contributions: The partnership of the retired NFL players made this study possible.