title: Speedy obsolescence of methods for radioassay.
mesh_terms: D000906:Antibodies; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D011863:Radioimmunoassay / Q000379:methods*; D013997:Time Factors
chemical_list: D000906:Antibodies; D006854:Hydrocortisone