living in a high-fluoride area (average concentration of 4.12 mg/L) with those of children living in a low-fluoride area (average concentration 0.91 mg/L). Using the Rui Wen Test, the investigators found that the average IQ of children in the high-fluoride area (97.69) was significantly lower than that of children in the low-fluoride area (105.21). No sex differences were found, but, not surprisingly, IQ scores were found to be related to parents’
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7 Neurotoxicity and Neurobehavioral Effects ."
Fluoride in Drinking Water: A Scientific Review of EPA's Standards . Washington, DC: The National Academies Press,
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