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Maternal periconceptional folic acid intake and risk of autism spectrum disorders and developmental delay in the CHARGE (CHildhood Autism Risks from Genetics and Environment) case-control study.
Schmidt RJ, Tancredi DJ, Ozonoff S, Hansen RL, Hartiala J, Allayee H, Schmidt LC, Tassone F, Hertz-Picciotto I. Schmidt RJ, et al. Am J Clin Nutr. 2012 Jul;96(1):80-9. doi: 10.3945/ajcn.110.004416. Epub 2012 May 30. Am J Clin Nutr. 2012. PMID: 22648721 Free PMC article.