Fig. 1

Kaplan–Meier survival curves of the 962 investigated patients in the whole cohort. a overall survival, b distant metastasis-free survival, c local recurrence-free survival, d Nodal recurrence-free survival
Kaplan–Meier survival curves of the 962 investigated patients in the whole cohort. a overall survival, b distant metastasis-free survival, c local recurrence-free survival, d Nodal recurrence-free survival