title: Specific radioactivity of radioimmunoassay tracer determined by self-displacement: a re-evaluation.
mesh_terms: D000804:Angiotensin II / Q000032:analysis* / Q000276:immunology; D000941:Antigens / Q000032:analysis*; D005069:Evaluation Studies as Topic; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D000941:Antigens; D000804:Angiotensin II