title: The role of patient-centered outcomes in defining the clinical course of chronic obstructive pulmonary disease. Introduction.
authors.forename: Donald P
authors.initials: DP
authors.lastname: Tashkin
mesh_terms: D018450:Disease Progression; D004417:Dyspnea / Q000209:etiology; D005541:Forced Expiratory Volume; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications / Q000401:mortality / Q000503:physiopathology* / Q000628:therapy*; D011788:Quality of Life; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology