title: A comparison of results using three commercially available vitamin B-12 radioassay kits.
mesh_terms: D003037:Cobalt Radioisotopes; D005069:Evaluation Studies as Topic; D006801:Humans; D008722:Methods; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D003037:Cobalt Radioisotopes; D014805:Vitamin B 12