title: A simple, solid-phase iodine-125 radioimmunoassay for theophylline.
mesh_terms: D006801:Humans; D007457:Iodine Radioisotopes; D011863:Radioimmunoassay / Q000379:methods; D013806:Theophylline / Q000097:blood*
chemical_list: D007457:Iodine Radioisotopes; D013806:Theophylline