SLITRK4 and hepatocellular carcinoma: We also searched the GEPIA database (http://gepia.cancer-pku.cn/index.html) to check SLITRK4 clinical significance in HCC samples, and the data showed that SLITRK4 expression was increased in HCC samples and a higher SLITRK4 meant a lower survival rate in HCC patients (Figure 3D,E).