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 NEW YORK (AP) - Troy Aikman says he has no symptoms from his 10 concussions during his Hall of Fame career with the Dallas Cowboys. Defensive players, he thinks, are more at risk than quarterbacks.
Aikman does get migraine headaches. But he's had them all his life and he says they're not related to football.
Last week, a study of more than 2,500 retired NFL players found that those who had at least three concussions during their careers had triple the risk of clinical depression as those who had none.
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