Fig. 2From: Prognostic model on overall survival in elderly nasopharyngeal carcinoma patients: a recursive partitioning analysis identifying pre-treatment risk stratificationPrognostic stratification by recursive partitioning analysis in elderly NPC for predicting overall survival. NPC, nasopharyngeal carcinoma; EBV, Epstein-barr virus; EBV DNApre, pre-treatment EBV DNA level; RPA, recursive partitioning analysisBack to article page