. 2022 Feb 11;19(4):2008. doi: 10.3390/ijerph19042008
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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 (https://creativecommons.org/licenses/by/4.0/).
Figure 1.
Chemical principal component (PC) loadings.