Figure 1. Expression of KDR and its association with survival in OSCC. (A) KDR expression data from the TCGA-OSCC dataset. (B) Survival curves based on KDR expression data and tumor grade from the TCGA-OSCC dataset. (C) Lasso Cox regression analysis of core circadian clock genes in OSCC. (D) mRNA expression of KDR in the normal cell line HOK and the OSCC cell lines HN6, HB96, CAL27, and HN4. (n = 3 in each group) *P < 0.05 **P < 0.01.