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. 2018 Jan 2;18:4. doi: 10.1186/s12885-017-3916-y

Fig. 4.

Fig. 4

Kaplan–Meier survival curve for disease-free survival according to PD-L1 expression in PTs and LNMs. DFS was not significantly worse in patients with PD-L1 expression in the  PT and tumor cells in the LNM (a, b, d). DFS was significantly worse in patients with PD-L1 expression in the nodal lymphocytes (c)