Comparative study of vitamin B12 assay in urine.
D001681:Biological Assay; D001826:Body Fluids; D045728:Corrinoids; D006397:Hematinics; D006801:Humans; D014556:Urine; D014805:Vitamin B 12 / Q000652:urine*
D045728:Corrinoids; D006397:Hematinics; D014805:Vitamin B 12
URINE; VITAMIN B12/in urine