CCR6 and age-related macular degeneration: Patients with non-exudative AMD had features of both control individuals and patients with exudative AMD, i.e. correlations of CD4+IL23R+ with Th1 and CD4+CXCR3+CCR6+ cells; of CD4+CCR6+ cells with Th17 cells, Th17/Th1-ratio, and CD4+CXCR3+CCR6+ cells; and of Th17/Th1-ratio with Th17 and CD4+IL23R+ cells.