Fig. 2

The activities of PD-1. A. The activities of the CD3 + PD-1+ among NG&HT, PTC&noHT and PTC&HT. B. The activities of the CD3 + CD4 + PD-1+ among NG&HT, PTC&noHT and PTC&HT. C. The activities of the CD3 + CD8 + PD-1+ among NG&HT, PTC&noHT and PTC&HT (*P < 0.05)