1. State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, Collaborative Innovation Center for Cancer Medicine, Tianjin, China;
2. Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Tianjin, China;
3. Division of Hematology/Oncology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA; and
4. Department of Stem Cell and Regenerative Medicine, Peking Union Medical College, Tianjin, China