<qa>  What is the racial activity of fibrocytes in peripheral blood and synovialThe hypothesis is that fibrocytes are present in the blood and synovial tissue in RA. Patients with early and long-standing RA have higher concentrations of fibrocytes in peripheral blood and synovial tissue compared to a control groups. Levels of fibrocytes in peripheral blood and synovial tissue are correlated with RA disease activity measures and imaging findings. 