title: Effective therapy for chronic bronchitis and emphysema.
mesh_terms: D001991:Bronchitis / Q000628:therapy*; D001993:Bronchodilator Agents / Q000627:therapeutic use*; D005069:Evaluation Studies as Topic; D006801:Humans; D007385:Intermittent Positive-Pressure Ventilation; D008019:Life Style; D010102:Oxygen Inhalation Therapy; D005082:Physical Exertion; D011656:Pulmonary Emphysema / Q000628:therapy*; D011788:Quality of Life
chemical_list: D001993:Bronchodilator Agents