title: Depression in an elderly man.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ishida
mesh_terms: D000368:Aged; D003866:Depressive Disorder / Q000628:therapy*; D006801:Humans; D008297:Male; D012931:Social Environment; D014805:Vitamin B 12 / Q000627:therapeutic use
chemical_list: D014805:Vitamin B 12