FOXP3 and tropical spastic paraparesis: Further, the percentage of Foxp3+ cells in this subset was decreased in HAM/TSP patients than in HDs (right panel, Figure 3B; p = 0.002), and the frequency of Foxp3+ cells in this subset in the total PBMCs was equivalent in HAM/TSP patients and HDs (right panel, Figure 3A; p = 0.817).