No abstract available
MeSH terms
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Adolescent
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Adolescent Behavior*
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Athletic Injuries / epidemiology
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Athletic Injuries / etiology
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Attitude to Health*
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Coronary Disease / epidemiology*
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Coronary Disease / prevention & control
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Exercise / physiology*
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Female
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Health Surveys
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Humans
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Life Style
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Male
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Physical Fitness / physiology
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United States / epidemiology