title: Vitamin B12 deficiency.
authors.forename: W L
authors.initials: WL
authors.lastname: Lyons
authors.forename: K
authors.initials: K
authors.lastname: Yaffe
mesh_terms: D000368:Aged; D003072:Cognition Disorders / Q000209:etiology*; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D008609:Mental Status Schedule; D014728:Veterans; D014806:Vitamin B 12 Deficiency / Q000150:complications*