Urinary methylmalonic acid/creatinine ratio: a gold standard test for tissue vitamin B12 deficiency.
Norman
E J
EJ
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*
D008764:Methylmalonic Acid; D003404:Creatinine; D014805:Vitamin B 12