1. Division of Blood Transfusion Shinshu University Hospital Matsumoto Japan
2. Division of Hematology Jichi Medical University Saitama Medical Center Saitama Japan
3. Department of Pediatrics Yokohama City University Hospital Yokohama Japan
4. Department of Hematology Federation of National Public Service Personnel Mutual Aid Associations Toranomon Hospital Tokyo Japan
5. Hematology Division Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
6. Department of Hematopoietic Stem Cell Transplantation National Cancer Center Hospital Tokyo Japan
7. Department of Hematology Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital Nagoya Japan
8. Department of Hematology Hamanomachi Hospital Fukuoka Japan
9. Department of Hematology Kanagawa Cancer Center Yokohama Japan
10. Department of Hematology Hyogo College of Medicine Hospital Nishinomiya Japan
11. Department of Hematology Hiroshima Red Cross Hospital & Atomic‐bomb Survivors Hospital Hiroshima Japan
12. Department of Hematology and Oncology Okayama University Hospital Okayama Japan
13. Department of Hematology Hokkaido University Hospital Sapporo Japan
14. Children's Cancer Center National Center for Child Health and Development Tokyo Japan
15. Japanese Data Center for Hematopoietic Cell Transplantation Nagakute Japan
16. Department of Registry Science for Transplant and Cellular Therapy Aichi Medical University School of Medicine Nagakute Japan
17. Department of Pediatrics The University of Tokyo Hospital Tokyo Japan