Fig. 2

a Kaplan-Meier overall survival curve (p = 0.38); b Kaplan-Meier progression-free survival (p = 0.373). Patients were stratified by pathologic regional lymph node status
a Kaplan-Meier overall survival curve (p = 0.38); b Kaplan-Meier progression-free survival (p = 0.373). Patients were stratified by pathologic regional lymph node status