A pilot study of the safety and efficacy of dexamethasone, ifosfamide, methotrexate and gemcitabine chemotherapy for natural killer/T-cell lymphoma. Issue 7 (July 2015) - Yang, Jianliang; Shi, Yuankai; He, Xiaohui; Dong, Mei; Zhang, Changgong; Liu, Peng; Zhou, Shengyu; Qin, Yan; Gui, Lin; Yang, Sheng; Sun, Yan