title: 57Co: a volume marker for the triple-isotope, double-antibody radioimmune assay.
mesh_terms: D002272:Carcinoembryonic Antigen / Q000032:analysis; D002614:Chelating Agents; D003037:Cobalt Radioisotopes; D003201:Computers; D011863:Radioimmunoassay / Q000379:methods*; D012979:Sodium Radioisotopes
chemical_list: D002272:Carcinoembryonic Antigen; D002614:Chelating Agents; D003037:Cobalt Radioisotopes; D012979:Sodium Radioisotopes