No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Age Factors
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Canada
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Diagnostic Errors*
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Female
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Humans
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Longitudinal Studies
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Male
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Pulmonary Disease, Chronic Obstructive / diagnosis*
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Respiratory Function Tests
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Sex Factors
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Smoking
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Socioeconomic Factors