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Cantu is a paid consultant to the National Football League (NFL) Head Neck and Spine Committee and National Operating Committee on Standards for Athletic Equipment (NOCSAE), and is a paid member of the Medical Science Committee for the National Collegiate Athletic Association (NCAA) Student-Athlete Concussion Injury Litigation. He receives royalties from book publications, and compensation from expert legal opinion. Ann C. McKee has received funding from the NFL, World Wrestling Entertaintment (WWE), and is a member of the Mackey-White Committee of the NFL Players Association. Robert A. Stern has received research funding from Avid Radiopharmaceuticals, Inc. (Philadelphia, PA, USA). He is a member of the Mackey-White Committee of the NFL Players Association. He is a paid consultant to Biogen (Cambridge, MA) and Eli Lilly (Indianapolis, IN), and is a paid member of the Medical Science Committee for the NCAA Student-Athlete Concussion Injury Litigation. He receives royalties for published neuropsychological tests from Psychological Assessment Resources, Inc. (Lutz, FL). Alexander Lin was responsible for study concept and design, revising the manuscript, and analysis and interpretation of data. He is a paid consultant for Agios pharmaceuticals and Moncton MRI. He is also co-founder of Brainspec Inc. The remaining authors have no conflicts of interest to report. All authors have given final approval of the version to be published and agree to be accountable for the work.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and\/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}