1. State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China;
2. Center for Stem Cell Medicine, Chinese Academy of Medical Sciences, Beijing, China;
3. Institute of Immunology, The First Hospital, Jilin University, Changchun, Jilin, China;
4. Department of Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong; and
5. Columbia Center for Translational Immunology, Columbia University Medical School, New York, NY