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Showing articles 0 to 2 of 2 Filter Applied: vitamin,multiple (Click to remove) Periconceptional Folic Acid Exposure and Risk of Occurrent Neural Tube Defects JAMA 269:1257-1261, 12921993., Werler,M.M.,et al, 1993 The Changing Epidemiology of Neural Tube Defects, United STates, 1968-1989 Am J Dis Child 146:857-861, Yen,I.H.,et al, 1992 Showing articles 0 to 2 of 2