No abstract available
MeSH terms
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Adolescent
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Child
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Child, Preschool
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Cross-Sectional Studies
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Female
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Follow-Up Studies
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Germany / epidemiology
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Health Status Indicators*
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Health Status*
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Health Surveys / statistics & numerical data*
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Health Surveys / trends*
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Humans
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Longitudinal Studies
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Male
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Quality of Life*
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Risk Factors