Stone, D H Possible prevention of neural-tube defects by periconceptional vitamin supplementation. [electronic resource] - Lancet (London, England) Mar 1980 - 647 p. digital Publication Type: Comparative Study; Letter ISSN: 0140-6736 Subjects--Topical Terms: EnglandFemaleHumansNeural Tube Defects--epidemiologyNorthern IrelandRecurrenceRiskVitamins--administration & dosage