Concussion was defined according to the Berlin CISG Criteria ... (n=9), case–controlled (n=5), inception cohort (n=3), qualitative (n=2), retrospective chart review (n=1) and repeated measures (n=1) ...

The NFL this season recorded its fewest number of concussions since it began tracking the data in 2015, the league announced Thursday. The total of 182 concussions during games and practices in ...

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