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. 2016 Mar 16;13(3):328. doi: 10.3390/ijerph13030328

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Dose-response relationships between cumulative lead dust/fume exposure and lead poisoning and abnormal ZPP. (A) BMD and BMDL of cumulative lead dust for lead poisoning; (B) BMD and BMDL of cumulative lead dust for abnormal ZPP; (C) BMD and BMDL of cumulative lead fumes for lead poisoning; (D) BMD and BMDL of cumulative lead fumes for abnormal ZPP, where the X-axis (i.e., dose) represents cumulative lead dust/fume dose (mg·y/m³), and Y-axis (i.e., fraction affected) represented rates of lead poisoning (A,C) or abnormal ZPP (B,D). Abbreviations: ZPP, erythrocyte zinc protoporphyrin; BMD, benchmark dose; BMDL, benchmark dose lower bound.