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Chemical–gene interaction networks. Chemical–gene interactions were predicted for the genes in the competing endogenous RNA (ceRNA) networks by using the CTD database. The chemical–gene interaction network of genes in the CD4+ T cell-related ceRNA network (a) and CD8+ T cell-related ceRNA network (b). Green nodes represent down-regulated genes. Blue squares represent small chemical molecules. Purple inverted triangles represent long non-coding RNAs
