title: Questions on serum levels of theophylline.
mesh_terms: D001249:Asthma / Q000097:blood / Q000188:drug therapy*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007700:Kinetics; D013806:Theophylline / Q000097:blood* / Q000627:therapeutic use
chemical_list: D013806:Theophylline