FIGURE 1.
PD-1 expression on virus-specific CD8+ T lymphocytes in ACs and ATLL patients. Percentage of PD-1 expression on HTLV-1-, CMV-, and EBV-specific CD8+ lymphocytes in AC, ATLL, and HD. Horizontal bars indicate the mean percentage of PD-1 positive cells. *P < 0.01; **P < 0.05 (Significant differences by Mann-Whitney U test). Numbers are means ± SD.