Figure 8From: Preconception care: nutritional risks and interventionsmultivitamin supplementation and risk of concurrent neural tube defects: evidence from observational studies Citations to the included studies: Bower 1992 [129], Chen 2008[133], Czeizel 1996 [134], Czeizel 2004 [135], Mulinare 1988 [136], Shaw 1995 [200], Werler 1993 [138]Back to article page