The light at the end of the tunnel: is COPD prevalence changing?
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D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis / Q000453:epidemiology*; D015272:Pulmonary Medicine / Q000639:trends