CD274 and tongue cancer: Figure 3F was from the cheek carcinoma of stage 1, Figure 3G was from the maxillary squamous cell carcinoma of stage 2, Figure 3H was from the maxillary squamous cell carcinoma of stage3, and Figure 3I was from the tongue carcinoma of stage 4. Infiltration of CD8+ T cells was more in stages 2 and 3 (Figures 3G, H), and the expression of PD-L1 was more in stage 3 (Figure 3H), which was consistent with the statistics of Figure 3C.