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. 2018 Jun 15;5:21. doi: 10.1186/s40634-018-0132-x

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© The Author(s). 2018

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.

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Fig. 3 — MMP-3 and GAG levels correlate with Ahlbӓck and Kellgren-Laurence (KL) radiographic scores. a Ahlbӓck vs GAG; b Ahlbӓck vs MMP-3; c Kellgren-Laurence vs GAG; and d Kellgren-Laurence vs MMP-3 levels in the synovial fluid of all knees (n = 16)