Thank you for the fascinating article and data showing correlation between elevated fluoride and kidney stones. Your correlations look strong, but is it possible that fluoride is cross-correlated with some other factors? Here in the desert southwest USA we also have elevated fluoride in groundwater in geothermally-warmed aquifers. A small inexpensive RO unit can remove >90% of the fluoride.

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Thank you for the fascinating article and data showing correlation between elevated fluoride and kidney stones. Your correlations look strong, but is it possible that fluoride is cross-correlated with some other factors? Here in the desert southwest USA we also have elevated fluoride in groundwater in geothermally-warmed aquifers. A small inexpensive RO unit can remove >90% of the fluoride.

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