Vitamin B12 deficiency with emphasis on methylmalonic acid as a diagnostic aid.
D006801:Humans; D008297:Male; D008314:Malonates / Q000652:urine; D008875:Middle Aged; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*; D014811:Vitamin E Deficiency / Q000175:diagnosis / Q000378:metabolism
D008314:Malonates