ATR and hepatocellular carcinoma: Before propensity score matching, ATR was identified as an independent risk factor for overall survival (low vs medium: HR 1.41, 95% CI 1.03‐1.94; P=.03; medium versus high: HR 1.59, 95% CI 1.02‐2.47; P=.04) and relapse-free survival (low vs medium: HR 1.33, 95% CI 1.03‐1.70; P=.03; medium versus high: HR 2.10, 95% CI 1.40‐3.15; P<.001) of patients with HCC following hepatectomy.