Kaplan-Meier survival curves of patients. (A) OS according to EBV-infected cell lineages. (B) OS based on the whether EBV-positive T/NK cells were detected or not at 8 weeks after initial treatment. (C) OS according to EBV-DNA load at 8 weeks after initial treatment in PBMC. (D) OS of according to EBV-DNA load at 8 weeks after initial treatment in plasma. (E) OS of patients who received HSCT compared with those who did not. (F) OS based on whether EBV-positive T/NK cells were detected at 8 weeks after initial treatment among patients who underwent HSCT.