CXCL10 and systemic lupus erythematosus: SLE patients who were EBV-EA IgG seropositive had significantly elevated levels of IL-10 (p = 0.0011), IP-10 (p < 0.001), and BLyS (p < 0.001) compared to those who were EBV-EA IgG negative (Fig. 3A–C).