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. 2021 Feb 2;8:617200. doi: 10.3389/fmed.2021.617200

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Copyright © 2021 Zhou, Chu, Liu, He, Han, Yan, Qu, Li and Yu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Histological observation of the articular cartilage and OARSI score. (A) SandF and HandE staining of the articular cartilage in OA, OP-OA, and normal patients. (B) The OARSI score of the cartilage in the femur head. “*” indicated p < 0.05; “**” indicated p < 0.01.