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Comparison of levels of anti-dsDNA antibodies in 851 SLE patients with and without anti-DFS70 antibodies. Anti-DFS70 and anti-dsDNA antibodies were both measured by ELISA. DFS70, dense fine speckles 70; ELISA, enzyme-linked immunosorbent assay; neg, negative; pos, positive; SLE, systemic lupus erythematosus. *** p < 0.001.
