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Kaplan-Meier survival analysis of mTOR expression in total cohort of ESCC patients (n = 148); (a) high expression of mTOR was closely correlated with inferior overall survival; (b) disease-free survival in ESCC patients. The median survival time for patients with high and low expression of mTOR was 23.9 versus 33.9 months for OS (P < 0.001) and 18.4 versus 31.4 months for DFS (P < 0.001) (ESCC: esophageal squamous cell carcinoma).
