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NOCSAE Finalizes First-Ever Football Helmet Standard to Address Concussion Risks from Rotational Forces and First Chest Protector Standard for Commotio Cordis – NOCSAE
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NFL helmet safety testing results: Vicis ranks first again for its high-tech head protector – GeekWire
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Evolution of the football helmet, including those emblems we're so used to seeing – Orange County Register
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