Methylmalonic acid excretion and serum vitamin B-12.
D000328:Adult; D000368:Aged; D002849:Chromatography, Gas; D005260:Female; D005743:Gastrectomy; D006801:Humans; D008297:Male; D008314:Malonates / Q000652:urine*; D008875:Middle Aged; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000378:metabolism*
D008314:Malonates; D014805:Vitamin B 12