香蕉视频

Laurent Duvernay-Tardif of the NFL's Kansas City Chiefs (and a fourth year medical student at 香蕉视频) says professional sports now employ spotters to watch for players with concussion symptoms. "They're starting now to coach and teach more and more the rugby tackling style, where you get your head out of the contact and you tackle with your chest and shoulders and you avoid those hits to your head," said Duvernay-Tardif.

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