Supplementary Figure S2 from Prognostic Impact of Cigarette Smoking on the Survival of Patients with Established Nasopharyngeal Carcinoma

(a)Overall survival, (b) progression-free survival according to smoking status at diagnosis; (c)overall survival, (d) progression-free survival of smoking history group versus no smoking history group inthe intensity-modulated radiotherapy or three-dimensional conformal radiotherapy cohort.