title: Chronic obstructive pulmonary disease.
authors.forename: T K
authors.initials: TK
authors.lastname: Marras
authors.forename: L C
authors.initials: LC
authors.lastname: Marras
mesh_terms: D006801:Humans; D000860:Hypoxia / Q000209:etiology / Q000628:therapy; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000401:mortality / Q000628:therapy*; D010102:Oxygen Inhalation Therapy; D016019:Survival Analysis