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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 (http://creativecommons.org/licenses/by/4.0/).
Correlation loadings of the first four PLS-R factors for the regions W1 (a–c), W2 (g–i), G1 (d–f), and G2 (j–l) with the corresponding cell pathlengths.