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. 2015 Aug 25;16:224. doi: 10.1186/s12891-015-0679-y

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© Zhou et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Macroscopic observation of cartilage specimens after immobilization. a-c Experimental knees; d-f Contralateral knees; g Control knee. White arrows: roughness of the cartilage surface. Black arrows: cartilage defect