Moreover, serum CXCL13 levels in the LN patients (258.86 [185.50–392.18] pg/mL) were higher than those of the SLE-no-LN group (136.39 [104.23–257.50] pg/mL) (Z = 2.53, P = 0.01) (Figure 2(a)). Here, CXCL13 is linked to systemic lupus erythematosus.