No abstract available
MeSH terms
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Denmark / epidemiology
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Disease Susceptibility*
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Humans
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Prevalence
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Pulmonary Disease, Chronic Obstructive / classification
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Pulmonary Disease, Chronic Obstructive / etiology*
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Pulmonary Disease, Chronic Obstructive / physiopathology
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Severity of Illness Index
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Smoking / adverse effects*