title: A large private laboratory looks at immunoassay.
mesh_terms: D001322:Autoanalysis; D006801:Humans; D007118:Immunoassay; D007124:Immunoenzyme Techniques; D007753:Laboratories / Q000458:organization & administration*; D011863:Radioimmunoassay; D013974:Thyroxine / Q000032:analysis; D014481:United States
chemical_list: D013974:Thyroxine