CCNB2 and hepatocellular carcinoma: The expression of figure genes with high degrees in module 1 was higher in HCC samples than in normal samples such as DNA Topoisomerase 2‐Alpha (TOP2A), Cyclin‐dependent kinase 1 (CDK1), Cyclin A2 (CCNA2), and Cyclin B2 (CCNB2) in module 1 (Table 2).