CD4 and diffuse large B-cell lymphoma: We also analyzed the proportion of 22 types of immune infiltrating cells among different risk groups in 481 DLBCL samples using the CIBERSORT algorithm (Supplementary Figure S2D), and the results showed that seven types of immune infiltrating cells were associated with risk scores: resting CD4 memory T cells, activated CD4 memory T cells, regulatory T cells, γδ T cells, and M0, M1, and M2 macrophages (Figure 8A).