Accepted for Publication: December 23, 2014.
Published Online: March 2, 2015. doi:10.1001/jamaneurol.2014.4778.
Study concept and design: Meier, Bellgowan, Polanski.
Acquisition, analysis, or interpretation of data: Meier, Bellgowan, Singh, Kuplicki, Mayer.
Drafting of the manuscript: Meier, Mayer.
Critical revision of the manuscript for important intellectual content: Bellgowan, Singh, Kuplicki, Polanski.
Statistical analysis: Meier.
Obtained funding: Bellgowan.
Administrative, technical, or material support: Singh, Kuplicki, Polanski.
Study supervision: Bellgowan, Mayer.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was conducted using internal funds from the Laureate Institute for Brain Research, which is supported by The William K. Warren Foundation.
Role of the Funder/Sponsor: The Laureate Institute for Brain Research 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.
Additional Contributions: We thank the psychiatric assessment team and magnetic resonance technicians at the Laureate Institute for Brain Research for their assistance in data collection and Christopher Nerio, MS, ATC (Department of Athletics, The University of Tulsa, Tulsa, Oklahoma), for athlete referral. These contributions were funded by the Laureate Institute for Brain Research, supported by The William K. Warren Medical Foundation.