1. Peking University People’s Hospital, Peking University Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China;
2. Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China;
3. The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China; and
4. Peking-Tsinghua Center for Life Sciences, Beijing, China