title: Searching for a pony.
mesh_terms: D003704:Dementia / Q000209:etiology*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D014805:Vitamin B 12 / Q000627:therapeutic use; D014806:Vitamin B 12 Deficiency / Q000150:complications* / Q000175:diagnosis / Q000188:drug therapy
chemical_list: D014805:Vitamin B 12