title: The contribution of bronchial muscle to airways obstruction in patients with chronic bronchitis.
mesh_terms: D000336:Aerosols; D000402:Airway Obstruction / Q000209:etiology*; D000403:Airway Resistance / Q000187:drug effects; D001285:Atropine / Q000494:pharmacology; D001980:Bronchi / Q000503:physiopathology; D001991:Bronchitis / Q000150:complications* / Q000503:physiopathology; D002908:Chronic Disease; D006801:Humans; D007275:Injections, Intravenous; D007545:Isoproterenol / Q000494:pharmacology; D009130:Muscle, Smooth; D011433:Propranolol
chemical_list: D000336:Aerosols; D001285:Atropine; D011433:Propranolol; D007545:Isoproterenol