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Changes in the birth prevalence of selected birth defects after grain fortification with folic acid in the United States: findings from a multi-state population-based study.
Canfield MA, Collins JS, Botto LD, Williams LJ, Mai CT, Kirby RS, Pearson K, Devine O, Mulinare J; National Birth Defects Preventin Network. Canfield MA, et al. Birth Defects Res A Clin Mol Teratol. 2005 Oct;73(10):679-89. doi: 10.1002/bdra.20210. Birth Defects Res A Clin Mol Teratol. 2005. PMID: 16240378
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