title: Vitamin B12 and cognitive decline.
authors.affiliation: Department of Neurology, Beytepe Military Hospital, Ankara, Turkey.
authors.forename: Serdar
authors.initials: S
authors.lastname: Tasdemir
authors.affiliation: Department of Neurology, Gulhane Military Medical Academy, Ankara, Turkey.
authors.forename: Umit Hidir
authors.initials: UH
authors.lastname: Ulas