1. Patrick G. Johnston Centre for Cancer Research Queen's University Belfast, Belfast, Northern Ireland, UK
2. State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology and Blood Diseases Hospital Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, People's Republic of China
3. Center for Stem Cell Medicine Chinese Academy of Medical Sciences, Beijing, People's Republic of China
4. Department of Stem Cell and Regenerative Medicine Peking Union Medical College, Beijing, People's Republic of China