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. 2017 Oct 30;32:e2017019. doi: 10.5620/eht.e2017019

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Copyright © 2017 The Korean Society of Environmental Health and Toxicology

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — Annual changes in the ambient air concentrations of lead from 1985 to 2013. Source from National Institute of Environmental Research. Annual report of air quality in Korea 2013. Incheon: National Institute of Environmental Research; 2014 [21].