FOXP3 and sarcoidosis: In the sarcoidosis patients, the Th17 cell population in BALF (3.05% ± 1.87%) was increased compared with levels in PBMCs (1.61% ± 1.09%) (p < 0.05), while CD4+ CD25high Foxp3+ Tregs in BALF were increased (2.19% ± 1.71%) compared to levels in PBMCs (0.95% ± 0.91%) (p < 0.05) (Figure 3B).