Figure 1From: Anti-C1q antibodies antedate patent active glomerulonephritis in patients with systemic lupus erythematosusAnti-C1q and anti-dsDNA titers in systemic lupus erythematosus patients. Comparison of (a) anti-C1q and (b) anti-dsDNA titers in the three groups of systemic lupus erythematosus (SLE) patients. IQR, interquartile range.Back to article page