Considerations in office management of chronic obstructive pulmonary disease.
D000318:Adrenergic beta-Agonists / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000188:drug therapy*; D011656:Pulmonary Emphysema / Q000188:drug therapy*; D013806:Theophylline / Q000627:therapeutic use*
D000318:Adrenergic beta-Agonists; D013806:Theophylline