Fig. 1(c) and (d) showthat all LCR values of single Pb exposure to adult (LCR values range
1.5 10 6–1.8 10 6) and children (LCR values range 1.0 10 6–
1.1 10 6) were lower than the acceptable LCR values stated by USEPA (2012) (LCR > 1 10 4).
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