Figure 1.

Increased frequencies of CD4⁺CCR4⁺ and CD4⁺CCR6⁺ T cells in patients with granulomatosis with polyangiitis (GPA). Percentages of CCR4⁺ (a) and CCR6⁺ (b) cells within the total CD4⁺ T cell population in patients with GPA and healthy controls (HCs). Percentages of positive cells were assessed by flow cytometry. Values are presented as mean ± standard error of the mean. ***P < 0.001, Mann-Whitney U test. CCR, CC chemokine receptor.