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Both preoperative exoPD-L1 and sPD-L can be used as biomarkers of survival. Kaplan–Meier estimation of A relapse-free survival (p = 0.0043) and B overall survival (p = 0.0034) in patients according to preoperative exoPD-L1 levels; Kaplan–Meier estimation of C relapse-free survival (p = 0.0041) and D overall survival (p = 0.0061) in patients according to preoperative sPD-L1
