A systematic investigation on the assay of vitamin B 12  in serum by radio-isotope dilution.
D000818:Animals; D002417:Cattle; D002606:Charcoal; D055598:Chemical Phenomena; D002621:Chemistry; D003036:Cobalt Isotopes; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007437:Intrinsic Factor; D007475:Ion Exchange Resins; D008297:Male; D008722:Methods; D011485:Protein Binding; D011865:Radioisotope Dilution Technique; D012710:Serum Albumin, Bovine; D014805:Vitamin B 12 / Q000097:blood*
D003036:Cobalt Isotopes; D007475:Ion Exchange Resins; D002606:Charcoal; D012710:Serum Albumin, Bovine; D007437:Intrinsic Factor; D014805:Vitamin B 12