title: Analysis of low theophylline concentrations using the Abbott TDx.
authors.forename: A G
authors.initials: AG
authors.lastname: Whitehead
authors.forename: N
authors.initials: N
authors.lastname: Grgurinovich
authors.forename: D J
authors.initials: DJ
authors.lastname: Birkett
mesh_terms: D003692:Delayed-Action Preparations; D006801:Humans; D011933:Reagent Kits, Diagnostic; D013806:Theophylline / Q000032:analysis* / Q000097:blood / Q000652:urine
chemical_list: D003692:Delayed-Action Preparations; D011933:Reagent Kits, Diagnostic; D013806:Theophylline