The assay of hydroxocobalamin in urine--a possible source of error.
D001681:Biological Assay; D003036:Cobalt Isotopes; D004356:Drug Storage; D005055:Euglena; D006801:Humans; D013696:Temperature; D014805:Vitamin B 12 / Q000652:urine*
D003036:Cobalt Isotopes; D014805:Vitamin B 12