UBR5 and hepatitis B virus infection: A comparison between UBR5 expression and different clinicopathological features in cohort 2 showed that UBR5 expression was positively correlated with tumor size, American Joint Committee on Cancer (AJCC) stage, histological grade, and lung metastasis (Table 1) but not with sex, age, differentiation, and hepatitis B virus (HBV) infection.