Once-a-day sustained-release theophylline: a clinical experience.
D000293:Adolescent; D001249:Asthma / Q000188:drug therapy; D002648:Child; D003692:Delayed-Action Preparations; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage* / Q000627:therapeutic use
D003692:Delayed-Action Preparations; D013806:Theophylline