Fig. 4From: Combination of smoking and Epstein-Barr virus DNA is a predictor of poor prognosis for nasopharyngeal carcinoma: a long-term follow-up retrospective studyKaplan-Meier curves for survival outcomes of 673 male patients stratified by cumulative smoking consumption and pre-treatment EBV DNA levels. a Overall survival. b Progression-free survival. c Locoregional relapse-free survival. d Distant metastasis-free survivalBack to article page