Figure 6. Immune cell infiltration analysis. (A) The correlation between infiltrating immune cells and ARG clusters. (B) Heat map of ARGs and immune cell relationships. (C–F) Comparison of immune cell abundance between the high and low expression groups of VCAN, OLR1, THBD, and TNFRSF21. *P < 0.05; **P < 0.01; ***P < 0.001.