Besides, our results indicated that the risk score of BRGPs signature was not correlated with PD-L1 mRNA expression levels in TCGA-NSCLC, GSE30219 and GSE37745, but was positively correlated with PD-L1 mRNA expression in GSE31210 (Figure 8B and Supplementary Figure 7). The gene discussed is CD274; the disease is non-small cell lung carcinoma.