To further explore whether UBE2D1 expression level was associated with the clinical outcome of HCC patients, we performed Kaplan-Meier analysis to reveal that the high expression level of UBE2D1 in tumor tissues was correlated with reduced overall survival of the HCC patients in GSE14520 (Fig. 1e). The gene discussed is UBE2D1; the disease is hepatocellular carcinoma.