title: Letter: Measurement of plasma renin activity.
mesh_terms: D000804:Angiotensin II / Q000097:blood; D003365:Costs and Cost Analysis; D005069:Evaluation Studies as Topic; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008722:Methods; D010949:Plasma / Q000201:enzymology; D011863:Radioimmunoassay; D012083:Renin / Q000097:blood*
chemical_list: D000804:Angiotensin II; D012083:Renin