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Correlations of anti-DFS70 O.D. value by ELISA with markers of disease activity in 851 SLE patients. Correlation of O.D. value of anti-DFS70 antibodies with the levels of anti-dsDNA antibodies (A), anti-C1q antibodies (B), and SLEDAI-2K (C). DFS70, dense fine speckles 70; ELISA, enzyme-linked immunosorbent assay; NS, no significance; O.D. value, optical density value; r, correlation coefficient; SLEDAI-2K, Systemic Lupus Erythematosus Disease Activity Index 2000.
