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Serum biomarkers differentially expressed in patients with and without ultrasound-defined synovitis. ANG, angiopoietin; bFGF, basic fibroblast growth factor; MMP, matrix metalloproteinase; PlGF, placental growth factor; SDF-1, stromal-cell derived factor-1; VEGF, vascular endothelial growth factor. CI, confidence interval; IQR, interquartile range.
