title: Erroneously low results due to high nonspecific binding encountered with a radioassay kit that measures "true" serum vitamin B12.
mesh_terms: D005188:False Negative Reactions; D006801:Humans; D011933:Reagent Kits, Diagnostic; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D011933:Reagent Kits, Diagnostic; D014805:Vitamin B 12