A trial of proxyphylline in the treatment of chronic obstructive airways disease.
D001249:Asthma / Q000188:drug therapy*; D001991:Bronchitis / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000627:therapeutic use*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013147:Spirometry; D013806:Theophylline / Q000627:therapeutic use*
D001993:Bronchodilator Agents; D013806:Theophylline