Fig. 6

Protein-protein interaction (PPI) network analysis of hub genes. A PPI network of hub genes obtained by Degree algorithm. B PPI network of hub genes obtained by Closeness algorithm. C PPI network of hub genes obtained by MNC algorithm. D Venn diagram of identified hub genes. E Expression profile of hub genes in the GSE57065 dataset. F Expression profile of hub genes in the GSE65682 dataset. G Expression profile of hub genes in the GSE145227 dataset