CXCR3 and psoriasis: Th17.1 cell percentage is increased (mean = 34.1, 95% CI 21.1–47) in patients (mean = 71.9, SD = 18.2) compared to healthy individuals (mean = 37.9, SD = 15.4), P < 0.0001 and CXCR3+-Th17 cell percentage is also increased (difference between medians 54.4) in psoriasis patients (mean = 78.3, SD = 16) compared to healthy controls (mean = 26.2, SD = 11), P < 0.0001 (Fig. 1B).