CCR6 and systemic lupus erythematosus: Positive correlations of anti-DNA titer were observed with Th9 (r = 0.4218, P = 0.0023), Th17 (r = 0.3608 P = 0.0101), Th17.1 (r = 0.4192 P = 0.0024) and CCR6+CCR4−CXCR3− Th (r = 0.4510 P = 0.0010; Table 2) cells in SLE patients.