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Child IQ at 6 years of age, by exposure to maternal antiepileptic drug use and periconceptional folate. Mean (95% confidence intervals) are shown for folate (solid lines) and no folate (dashed lines).IQ = intelligence quotient.Reprinted from Meador KJ, et al, Lancet Neurol.33 link.springer.com/article/10.1007/s11910-002-0013-6.
