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Angptl2 concentrations in serum and synovial fluid from RA and OA patients. A–D: RA (n = 14) and OA (n = 11) patients were examined. A: The concentration of serum C-reactive protein (CRP) in RA and OA patients. B: Standard curve obtained in the ELISA system. C: Serum Angptl2 levels in RA and OA patients. D: Synovial fluid Angptl2 levels in RA and OA patients. HS indicate the healthy control subjects. *P < 0.05 and **P < 0.01 in comparison with OA patients.
