CD274 and neoplasm: Over time, the growth of the tumors in the EPI-GEL and EPI-GEL/PD-L1 groups was slower than that in the control group, while the tumor growth in the EPI-GEL/PD-L1 group was slower than that in the PD-L1 group; the difference between the EPI-GEL and EPI-GEL/PD-L1 groups was significant.