Fig. 1

Kaplan–Meier analysis of overall survival. (A) All patients’ Kaplan–Meier analysis of overall survival (OS) are shown, according to modified response evaluation criteria in solid tumors. Median OS is 13.0 months (95% CI 10.587–15.413). (B) Kaplan–Meier estimates of OS among experimental group and control group are shown. P-value calculated is < 0.05.