Because some tumors did not have enough samples of normal tissue in TCGA (those tumors are shown with a white background in Figure 1(a)), we used normal tissues from the GTEx data set as a control, and evaluated the CUL5 expression difference between tumor and normal tissues of CHOL, DLBC, and THYM (P < 0.05, Figure 1(b)). The gene discussed is CUL5; the disease is neoplasm.