title: COPD phenotypes: the answers are in the noise.
authors.forename: Frank C
authors.initials: FC
authors.lastname: Sciurba
mesh_terms: D005540:Forced Expiratory Flow Rates / Q000502:physiology; D006801:Humans; D010641:Phenotype; D011379:Prognosis; D029424:Pulmonary Disease, Chronic Obstructive / Q000145:classification* / Q000503:physiopathology; D012720:Severity of Illness Index