title: Symptoms and peak expiratory flow rate: response to a slow release theophylline preparation.
mesh_terms: D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D003692:Delayed-Action Preparations; D005260:Female; D006801:Humans; D008297:Male; D010366:Peak Expiratory Flow Rate; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood / Q000627:therapeutic use*
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline