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. 2022 Jun 23;12(7):587. doi: 10.3390/metabo12070587

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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Summary and validation of the OPLS-DA models. (A–C) OPLS-DA score plots for Group A versus Group B (A), Group A versus Group C (B), and Group B versus Group C (C). The abscissa represents the predicted principal component and the ordinate represents the orthogonal principal component. (D–F) OPLS-DA permutation test plot for Group A versus Group B (D), Group A versus Group C (E), and Group B versus Group C (F). The abscissa represents model accuracy, and the ordinate represents the frequency of model classification effect.