The expression statuses of MAOA in various cancers are shown in Figure S2A. Among the RNA sequencing datasets, seven datasets showed a significant downregulation trend of MAOA in the HCC patients compared with the noncancer groups: GSE63018, GSE56545, GSE63863, GSE77509, GSE77314, TCGA‐GTEx, and GSE69164 (all with P‐values <.05; Figure S2B‐Q). This evidence concerns the gene MAOA and cancer.