[The use of sustained release theophylline preparations in chronic bronchospastic diseases].
D001986:Bronchial Spasm / Q000188:drug therapy*; D002908:Chronic Disease; D003692:Delayed-Action Preparations; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage*
D003692:Delayed-Action Preparations; D013806:Theophylline