title: [Vitamin B 12 in serum. A test of questionable value when an isotope binding technic is used].
mesh_terms: D001681:Biological Assay; D006801:Humans; D008828:Microbiological Techniques; D011786:Quality Control; D011865:Radioisotope Dilution Technique; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D014805:Vitamin B 12
vernacular_title: Vitamin B12 i serum. En undersøkelse av tvilsom verdi når det brukes isotop-bindingsteknikk.