**Figure 7.** **The publication bias of HULC-related research.** (**A**) The Egger’s test and linear regression plot for the publication bias of OS; (**B**) The Egger’s test and linear regression plot for the publication bias of age; (**C**) The Egger’s test and linear regression plot for the publication bias of gender; (**D**) The Egger’s test and linear regression plot for the publication bias of tumor size; (**E**) The Egger’s test and linear regression plot for the publication bias of TNM stage; (**F**) The Egger’s test and linear regression plot for the publication bias of differentiation; (**G**) The Egger’s test and linear regression plot for the publication bias of number of tumors; (**H**) The Egger’s test and linear regression plot for the publication bias of lymphatic node metastasis; (**I**) The Egger’s test and linear regression plot for the publication bias of distant metastasis.