CD8A and hematocrit: Stratification analyses revealed that the levels of anti-CD3 (r=0.2375, P=0.0375) and anti-CD8 (r=0.2298, P=0.0474), but not anti-CD16 (r=0.1829, P=0.1189) staining in the PTC+HT tissues were positively correlated with HLA class I expression (Fig. 3C), and the levels of IL-2 expression were positively correlated with anti-CD3 (r=0.2662, P=0.0238) and anti-CD16 (r=0.3037, P=0.0095), but not significantly with anti-CD8 staining in the PTC+HT tissues (r=0.2202, P=0.0631, Fig. 3D).