Trace element levels in drinking water and cognitive function among elderly Chinese
May 1, 2000
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American Journal of Epidemiology
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Emsley CL, Gao S, Li Y, Liang C, Ji R, Hall KS, Cao J, Ma F, Wu Y, Ying P, Zhang Y, Sun S, Unverzagt FW, Slemenda CW, Hendrie HC.
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151(9):913-20.