Department of Hematology Beijing Friendship Hospital Capital Medical University Beijing 100050 China;
Department of Hematology Beijing Friendship Hospital Capital Medical University Beijing 100050 China;
Department of Hematology Beijing Friendship Hospital Capital Medical University Beijing 100050 China;
Department of Hematology Beijing Friendship Hospital Capital Medical University Beijing 100050 China;
Chronic active Epstein-Barr virus infection; PEG-aspargase; Chemotherapy; L-asparaginase; Case report;