No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Age Factors
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Aged
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Aged, 80 and over
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Female
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Health Status
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Humans
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Informed Consent*
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London
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Male
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Medical Record Linkage / methods*
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Population Surveillance / methods
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Primary Health Care*
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Socioeconomic Factors
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Surveys and Questionnaires*