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

Fig. 5.

Fig. 5

Kaplan–Meier survival curve for disease-free survival and overall survival according to PD-L1 expression. a DFS was significantly worse in PD-L1 PT-/LNM+ and PT+/LNM+ patients. b OS was not significantly different among three groups