When full-contact practices were limited, blows to the head dropped, study found
From: http://redirect.viglink.com?u=http%3A%2F%2Fwww.webmd.com%2Fchildren%2Fnews%2F20160727%2Fsafer-heads-prevail-with-new-high-school-football-rule%3Fsrc%3DRSS_PUBLIC&key=ddaed8f51db7bb1330a6f6de768a69b8
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