9Yang QH,Botto LD,Gallagher M,et al.Prevalence and effects of gene- gene and gene-nutrient interac;tions on serum folate and serum total homocysteine concentrations in the United States: findings from the third National Health and Nutrition Examination Survey DNA Bank[J].Am J Clin Nutr,2008,88(1):232-246.
10L 6 pez-Camelo JS,Castilla EE,Orioli IM,et al.Folic acid flour fortification: impact on the frequencies of 52 congenital anomaly types in three South American countries[J].Am J Med Genet A,2010,152A(10):2444-2458.
