title: External quality control and standardization in labeled immunoassay.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis*; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007118:Immunoassay / Q000379:methods*
chemical_list: D000974:Antibodies, Antinuclear; D002272:Carcinoembryonic Antigen; D006514:Hepatitis B Surface Antigens