Peking University People’s Hospital;
Peking University Institute of Hematology;
Beijing 100044;
China;
National Clinical Research Center for Hematologic Disease;
Beijing 100044;
China;
Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation;
Beijing 100044;
China;
Collaborative Innovation Center of Hematology;
Peking University;
Beijing 100044;
China;
Peking-Tsinghua Center for Life Sciences;
Beijing 100044;
China;
second hematopoietic stem cell transplantation; acute leukemia; relapse; chemotherapy; modified donor lymphocyte infusion;