Defining chronic obstructive pulmonary disease... and the elephant in the room.
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Mannino
D006801:Humans; D015995:Prevalence; D029424:Pulmonary Disease, Chronic Obstructive / Q000145:classification* / Q000453:epidemiology / Q000503:physiopathology*; D012129:Respiratory Function Tests; D018570:Risk Assessment; D012720:Severity of Illness Index