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Two MTHFR polymorphisms, maternal B-vitamin intake, and CHDs.
van Driel LM, Verkleij-Hagoort AC, de Jonge R, Uitterlinden AG, Steegers EA, van Duijn CM, Steegers-Theunissen RP. van Driel LM, et al. Birth Defects Res A Clin Mol Teratol. 2008 Jun;82(6):474-81. doi: 10.1002/bdra.20463. Birth Defects Res A Clin Mol Teratol. 2008. PMID: 18452180
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