title: Measurement of plasma renin activity by radioimmunoassay after prolonged cold storage.
abstract: Measurement of plasma renin activities in four separate quality control pools showed no change when measured by radioimmunoassay after being individually stored at -20 degrees C for up to fifteen months, validating their use as long-term quality controls. These results contradict those reported by some authors.
mesh_terms: D001793:Blood Preservation; D003080:Cold Temperature; D006801:Humans; D011786:Quality Control; D011863:Radioimmunoassay; D012083:Renin / Q000097:blood*; D013997:Time Factors
chemical_list: D012083:Renin