Fig. 1From: Circulating cell‐free epstein–barr virus DNA levels and clinical features in Moroccan patients with nasopharyngeal carcinomaMortality and overall survival of NPC patients according to their pre-treatment EBV DNA load levels.a, b pre-treatment EBV DNA load < 1500 vs.≥1500 IU/ml. c, d pre-treatment EBV DNA load < 2000 vs.≥2000 IU/ml. e, f pre-treatment EBV DNA load < 4000 vs.≥4000 IU/ml. The p-value corresponds to the log-rank test valueBack to article page