Slow release theophyllines and chronic bronchitis.
D000420:Albuterol / Q000627:therapeutic use; D001991:Bronchitis / Q000188:drug therapy* / Q000503:physiopathology; D003692:Delayed-Action Preparations; D006801:Humans; D012129:Respiratory Function Tests; D013806:Theophylline / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*
D003692:Delayed-Action Preparations; D013806:Theophylline; D000420:Albuterol