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OBJECTIVE: To examine the efficacy and effect modifiers of folic acid supplementation in the prevention of stroke in regions without folic acid fortification based on relevant, up-to-date published randomized trials. METHODS: Relative risk (RR) was used to measure the effect of folic acid supplementation on risk of stroke using a fixed effects model. CONCLUSIONS: levels.
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Zhao et al. (2017) studied this question.
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