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. 2015 Apr 24;16(5):9341–9353. doi: 10.3390/ijms16059341

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© 2015 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 license (http://creativecommons.org/licenses/by/4.0/).

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Loading plots relevant to PC1, PC2 and PC3, which are mainly responsible for the discrimination among different clusters of chondrocytes cells associated with different grades of osteoarthritic cartilage.