title: Some problems encountered in the evaluation of bronchodilator therapy.
mesh_terms: D001986:Bronchial Spasm / Q000188:drug therapy / Q000503:physiopathology; D001993:Bronchodilator Agents / Q000627:therapeutic use*; D004341:Drug Evaluation; D005280:Fenoterol / Q000627:therapeutic use; D005541:Forced Expiratory Volume; D006801:Humans; D007545:Isoproterenol / Q000627:therapeutic use
chemical_list: D001993:Bronchodilator Agents; D005280:Fenoterol; D007545:Isoproterenol