title: Introduction: mechanisms of COPD.
authors.affiliation: University of Colorado Health Sciences Center, Denver, CO 80262, USA.
authors.forename: T L
authors.initials: TL
authors.lastname: Petty
authors.forename: S I
authors.initials: SI
authors.lastname: Rennard
mesh_terms: D000553:Ambulatory Care / Q000379:methods / Q000592:standards; D003226:Congresses as Topic; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000209:etiology* / Q000628:therapy; D010045:Outpatients; D010102:Oxygen Inhalation Therapy; D011013:Pneumonectomy; D011379:Prognosis; D012307:Risk Factors