No abstract available
MeSH terms
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Accident Prevention*
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Athletic Injuries / epidemiology
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Athletic Injuries / prevention & control*
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Bicycling / injuries*
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Case-Control Studies
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Craniocerebral Trauma / epidemiology
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Craniocerebral Trauma / prevention & control*
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Cross-Sectional Studies
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Head Protective Devices / statistics & numerical data
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Humans
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Incidence
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Odds Ratio