title: Oxygen in costs of COPD treatment.
authors.forename: T L
authors.initials: TL
authors.lastname: Petty
mesh_terms: D003365:Costs and Cost Analysis; D006801:Humans; D010102:Oxygen Inhalation Therapy / Q000191:economics*; D029424:Pulmonary Disease, Chronic Obstructive / Q000191:economics*; D014481:United States