Results showed that the percentage of Tregs in LLC-PD-L2 tumors was significantly higher than in control tumors (P < 0.01, Fig. 1f, Supplementary Fig. 5), while there was no significant difference in myeloid-derived suppressor cells (MDSC), macrophage (M1), tumor-associated macrophage (TAM), and M1/TAM ratio (Fig. 1f) between two groups. Here, PDCD1LG2 is linked to neoplasm.