Vitamin B12 deficiency.
Norman
E J
EJ
D000368:Aged; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008764:Methylmalonic Acid / Q000652:urine*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis* / Q000191:economics
D008764:Methylmalonic Acid