title: Assay drift in commercial immunoassay kits.
authors: S
authors: S
authors: Holding
authors: J
authors: J
authors: Heuck
mesh_terms: D006801:Humans; D007118:Immunoassay; D011786:Quality Control; D011933:Reagent Kits, Diagnostic / Q000592:standards*; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D011933:Reagent Kits, Diagnostic; D000509:alpha-Fetoproteins