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. 2010 Jul 1;69(7):1389–1395. doi: 10.1136/ard.2009.119776

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Proinflammatory cytokines/chemokines in synovial fluid and tissue PO₂ (tPO₂). A–D. Significant differences in tumour necrosis factor (TNF)α, interleukin (IL)1β, interferon (IFN)γ and macrophage inflammatory protein (MIP)3α levels between patients with tPO₂ values of greater or less than 20 mm Hg. p<0.05 was significantly different. E,F. No significant differences in IL6 and IL8 levels between patients with tPO₂ values of greater or less than 20 mm Hg.