title: Rapid estimation of plasma theophylline concentrations.
mesh_terms: D005454:Fluorescence Polarization; D006801:Humans; D010783:Photometry; D013806:Theophylline / Q000097:blood*; D014970:Xanthines / Q000627:therapeutic use
chemical_list: D014970:Xanthines; C008514:methylxanthine; D013806:Theophylline