title: Plasma theophylline concentrations in asthmatic children receiving a twice daily theophylline preparation.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000097:blood* / Q000188:drug therapy; D002648:Child; D002675:Child, Preschool; D003692:Delayed-Action Preparations; D005260:Female; D006801:Humans; D008297:Male; D013806:Theophylline / Q000008:administration & dosage / Q000097:blood* / Q000627:therapeutic use
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline