title: Urinary methylmalonic acid/creatinine ratio: a gold standard test for tissue vitamin B12 deficiency.
authors.forename: E J
authors.initials: EJ
authors.lastname: Norman
mesh_terms: D000368:Aged; D003404:Creatinine / Q000652:urine*; D006801:Humans; D008764:Methylmalonic Acid / Q000097:blood / Q000652:urine*; D012680:Sensitivity and Specificity; D014728:Veterans; D014805:Vitamin B 12 / Q000097:blood; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*
chemical_list: D008764:Methylmalonic Acid; D003404:Creatinine; D014805:Vitamin B 12