Research Paper Volume 15, Issue 4 pp 1107—1129
Prognostic significance of epidermal growth factor receptor and programmed cell death-ligand 1 co-expression in esophageal squamous cell carcinoma
Figure 7. Kaplan-Meier survival curves according to EGFR and PD-L1 co-expression in ESCC patients. (A) OS survival curves of different subgroups. (B) PFS survival curves of different subgroups. Blue line indicates EGFR (−)/PD-L1(+); green line indicates EGFR (−)/PD-L1(−); yellow line indicates EGFR (+)/PD-L1(+); purple line indicates EGFR (+)/PD-L1(−). EGFR, Epidermal Growth Factor Receptor. Abbreviation: PD-L1: programmed death-ligand 1.