FIRST‐LINE L‐ASPARAGINASE‐BASED CHEMOTHERAPY PLUS RADIOTHERAPY IS ACTIVE IN STAGE I/II EXTRANODAL NK/T‐CELL LYMPHOMA: RESULTS FROM PEKING UNIVERSITY CANCER HOSPITAL. (June 2017) - Song, Y.; Jia, J.; Wu, M.; Leng, X.; Lin, N.; Xie, Y.; Zheng, W.; Wang, X.; Ping, L.; Tu, M.; Ying, Z.; Zhang, C.; et al.