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M.G.H. is a member of the NHL\/NHLPA Concussion Subcommittee and a consultant to the NHLPA, for which he receives remuneration. P.C. is a member of the NHL\/NHLPA Concussion Subcommittee and a paid consultant to the NHLPA. K.R. is a part-time employee of the NHL. J.M.B. is a part-time employee of the NHL. J.M.B. is a paid consultant for Med-IQ and Sporting KC. J.M.B. also receives grant funding from Genzyme. R.J.E. is a paid consultant for the NHL and co-chair of the NHL\/NHLPA Concussion Subcommittee. He is also a paid consultant for Major League Soccer. He is currently a co-principal investigator (PI) and occasionally provides expert testimony in matters related to MTBI and sports concussion. R.J.E. was funded by the NFL (NFL-Long) through Boston Children\u2019s Hospital. S.D. serves as the chief medical consultant for the NHLPA and the chief medical officer for CF Montreal of Major League Soccer, roles for which he is remunerated.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"No specific sources of funding were used to assist in the conduct of this study or the preparation of this article.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Funding"}},{"value":"J.M.B. conceived of the study idea and contributed to design, statistical analysis, writing, and critical revision of the manuscript; K.E.R. contributed to writing and critical revision; R.J.E. contributed to design, writing, and critical revision; P.C., W.M., J.S.D., and M.H. contributed to design and critical revision. All authors read and approved the final version of the manuscript.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Author contributions"}},{"value":"This study was approved (IRB project # 2019826) by the UMKC IRB (FWA # 00005427).","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}},{"value":"All players provided consent to use their data for program evaluation and quality improvement. This project posed minimal risk and used de-identified archival data. As such, need for written informed consent was waived by the institutional review board.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"The data are not publicly available because they contain information that could compromise the privacy of participants.","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Data availability statement"}}]}}