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. 2017 Jun 1;22(6):918. doi: 10.3390/molecules22060918

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© 2017 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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Loading plots and scatter plots obtained by PCA. (A) Loadings on PC 1 and PC 2 of all the analytes except for guanine and taurine; (B) Loadings on PC 1 and PC 3 of all the analytes except for guanine and taurine; (C) Scatter plots of the 50 ASR samples; (D) Scatter plots of the 50 ASR samples.