title: Experience with a simplified method of radio-isotopic assay of serum vitamin B 12.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001681:Biological Assay; D003036:Cobalt Isotopes; D005260:Female; D006801:Humans; D007437:Intrinsic Factor; D007778:Lactobacillus / Q000378:metabolism; D008297:Male; D008722:Methods; D008875:Middle Aged; D011485:Protein Binding; D011865:Radioisotope Dilution Technique; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis
chemical_list: D003036:Cobalt Isotopes; D007437:Intrinsic Factor; D014805:Vitamin B 12