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Gene correlation analysis. The association between CDKN2A expression and genes related to cuproptosis (A), immune checkpoint (B), immune-suppressive status (C) and immune-activation (D) was presented by heatmaps. Each square represented the correlation between CDKN2A and other genes. Red suggested positive correlation, and blue represented negative correlation. * P < .05, ** P < .01. CDKN2A = cyclin dependent kinase inhibitor 2A.
