title: A radiosorbent technique for the assay of serum vitamin B12.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003036:Cobalt Isotopes; D005055:Euglena; D006801:Humans; D007437:Intrinsic Factor; D008722:Methods; D008875:Middle Aged; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000097:blood*
chemical_list: D003036:Cobalt Isotopes; D007437:Intrinsic Factor; D014805:Vitamin B 12