title: Measurement of human plasma renin substrate concentration by angiotensin I radioimmunoassay: a discussion of methodical problems.
mesh_terms: D000804:Angiotensin II / Q000097:blood*; D001681:Biological Assay; D001800:Blood Specimen Collection; D003276:Contraceptives, Oral / Q000494:pharmacology; D010450:Endopeptidases / Q000097:blood; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D008297:Male; D008722:Methods; D007703:Peptidyl-Dipeptidase A / Q000097:blood; D011247:Pregnancy; D011863:Radioimmunoassay; D012083:Renin / Q000097:blood*
chemical_list: D003276:Contraceptives, Oral; D007457:Iodine Radioisotopes; D000804:Angiotensin II; D010450:Endopeptidases; D007703:Peptidyl-Dipeptidase A; D012083:Renin