Serum B12 and folic acid assays--a critical view.
D000748:Anemia, Macrocytic / Q000097:blood; D001681:Biological Assay; D003365:Costs and Cost Analysis; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D012606:Scotland; D014805:Vitamin B 12 / Q000097:blood*
D005492:Folic Acid; D014805:Vitamin B 12