(A) Protein–protein interaction network with the nodes with confidence of interactive relationship larger than 0.70. (B) The top ranked 30 genes were ordered according to the number of nodes. (C) Kaplan–Meier survival analysis and Univariate COX regression analysis were performed to identify prognostic genes form DEGs. (D) Venn plot was draw to show the common genes between the top 30 nodes in PPI network and prognostic genes.