Fig. 3From: Clinical significance of serum-derived exosomal PD-L1 expression in patients with advanced pancreatic cancerKaplan–Meier estimates of overall survival according to serum exoPD-L1 levels. (A) Overall survival in all cohorts (n = 77), (B) in patients with metastatic disease (n = 69), (C) in patients who received systemic treatment (n = 65), and (D) in patients with metastatic disease who received chemotherapy (n = 57)Back to article page