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Serum concentrations of angiogenic factors: box plot representing the concentrations of angiogenic mediators in the serum of PsA patients with active disease (active PsA), PsA patients in remission (Rem. PsA), RA patients with active disease (active RA) and healthy volunteers (HC). a CD147, b VEGF, c endostatin, d thrombospondin-1 (Tsp-1), e MMP-9, and f the ratio between CD147 and Tsp-1 as a suggested measure of enhanced angiogenesis
