Radioassays.
D000818:Animals; D001667:Binding, Competitive; D049673:History, 20th Century; D006801:Humans; D007118:Immunoassay; D009683:Nuclear Medicine / Q000266:history*; D011863:Radioimmunoassay / Q000266:history; D011868:Radioisotopes; D014481:United States
D011868:Radioisotopes