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. 2014 Nov 14;11(11):11727–11752. doi: 10.3390/ijerph111111727

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© 2014 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 license (http://creativecommons.org/licenses/by/4.0/).

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Pearson R values for inter-site spatial correlation of single pollutants, integrated mobile source indicators (IMSIs) and positive matrix factorization (PMF) factors in each urban area.