1. Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China;
2. Department of Medicine, Pediatrics, and Oncology, University of Calgary Cumming School of Medicine, Calgary, AB, Canada;
3. University of Ottawa, Children’s Hospital of Eastern Ontario, Ottawa, QC, Canada;
4. Peking Union Medical College Hospital, Beijing, China;
5. Nanfang Hospital, Nanfang Medical University, Guangzhou, China;
6. Ruijin Hospital, Shanghai Jiaotong University Medical School, Shanghai, China;
7. Beijing Children’s Hospital, Capital Medical University, Beijing, China;
8. Shangdong Blood Center, Jinan, China; and
9. First affiliated Hospital, Chinese University of Science and Technology, Hefei, China