Measurement of vitamin B12 and serum folic acid: a comparison of methods.
D001681:Biological Assay; D005260:Female; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D008297:Male; D011933:Reagent Kits, Diagnostic; D014805:Vitamin B 12 / Q000097:blood*
D011933:Reagent Kits, Diagnostic; D005492:Folic Acid; D014805:Vitamin B 12