title: Vitamin B12 deficiency.
authors: J I
authors: JI
authors: Golden
mesh_terms: D000284:Administration, Oral; D000368:Aged; D006801:Humans; D014805:Vitamin B 12 / Q000627:therapeutic use*; D014806:Vitamin B 12 Deficiency / Q000175:diagnosis*
chemical_list: D014805:Vitamin B 12