title: Which of the following statements about the use of specific therapies in the treatment of chronic obstructive pulmonary disease are true?
mesh_terms: D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood / Q000628:therapy*; D010102:Oxygen Inhalation Therapy; D010276:Parasympatholytics / Q000627:therapeutic use; D013806:Theophylline / Q000097:blood / Q000627:therapeutic use
chemical_list: D000305:Adrenal Cortex Hormones; D000319:Adrenergic beta-Antagonists; D010276:Parasympatholytics; D013806:Theophylline