Fig. 6

Kaplan-Meier curves of breast cancer patients based on postoperative treatment. a OS and RFS curves of patients in CIK treatment group. Significantly improved prognosis was observed in patients with PD-L1-positive expression. b OS and RFS curves of patients in the control group. Patients with PD-L1-negative expression had better prognosis than patients with PD-L1-positive expression