1Rosenquist TH, Ratashak SA, Selhub J. Homocysteine induces congenital defects of the heart and neural tube: effect of folic acid proc [J]. Natl Acad Sci USA, 1996,93:15227-15232.
2Botto LD, Rhoury MJ, Mulinare J, et al. Periconceptional multivitamin use and the occurrence of conotruncal heart defects: results from a population-based [J]. Case-control study pediatrics, 1996, 98:911-917.
3Werler MW, Hayes C, louik C, et al. Multivitamin use and risk of birth defects [J]. Am J Epidemiol ,1999, 150:675-682.
4ScanlonKS, FerencZC, loffredo CA, et al. preconceptional folate intake and malformations of the cardiac outflow tract. Boltimore-Washington infant study group [J]. Epide miology, 1998, 9:95-98.
5Botto LD, mulinare J, Erickson JD. Occurrence of congenital heare Defecfs in relation to maternal multi vitamin use [J]. Am J Epidemiol , 2000, 151:878-884.
6Czeizel AE. Reduction of urinary tract and cardiovascular defects by periconceptional multivitamin supplecnentation [J]. Am J Med Genet, 1996, 62:179-183.
