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. 2019 Jul 2;16(13):2343. doi: 10.3390/ijerph16132343

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© 2019 by the authors.

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

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Distribution of individual PAH in PM_2.5: (a) background samples; (b) RS burning samples. X marker in each bar chart: the mean of PAH content. Dash in each bar chart: the median of PAH content.