title: Do we have any good reason to suggest restricting the use of oral contraceptives in women with pre-existing Vitamin B12 deficiency?
authors.forename: Mustafa Vakur
authors.initials: MV
authors.lastname: Bor
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D014805:Vitamin B 12 / Q000097:blood; D014806:Vitamin B 12 Deficiency / Q000209:etiology*
chemical_list: D003276:Contraceptives, Oral; D014805:Vitamin B 12