Fig. 4

Quantification of the CD8⁺T, Foxp3⁺, and PD-L1⁺ cells in 49 samples. a Number of CD8⁺ cells per mm². b Number of Foxp3⁺ cells per mm². c Average intensity of PD-L1 per mm². Data were analyzed using the Kruskal–Wallis test (nonparametric analysis). *p < 0.05, **p < 0.01, ***p < 0.001