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. 2021 Mar 5;21(5):1821. doi: 10.3390/s21051821

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© 2021 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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Violin plot for indices $I_{j}$ , $j \in {1, 2, 4, 6, 7}$ .