. 2022 Jul 30;19(15):9338. doi: 10.3390/ijerph19159338
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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 13.
Degradation trend of the data at points A–E.