1. Department of Hematology and Oncology, The Institute of Medical Science The University of Tokyo Tokyo Japan
2. Department of Hematology and Oncology Tokai University School of Medicine Isehara Japan
3. Department of Hematology Tokyo Women's Medical University Tokyo Japan
4. Department of Hematology 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 Kanagawa Cancer Center Yokohama Japan
9. Department of Hematology and Oncology Anjo Kosei Hospital Anjo Japan
10. Department of Hematology Hiroshima Red Cross Hospital & Atomic‐bomb Survivors Hospital Hiroshima Japan
11. Department of Hematology Kobe City Medical Centre General Hospital Kobe Japan
12. Department of Hematology Imamura General Hospital Kagoshima Japan
13. Preparation Department Japanese Red Cross Kinki Block Blood Center Osaka Japan
14. Division of Hematology Jichi Medical University Shimotsuke Japan
15. Division of Hematology Jichi Medical University Saitama Medical Center Saitama Japan
16. Japanese Data Center for Hematopoietic Cell Transplantation Nagakute Japan
17. Department of Registry Science for Transplant and Cellular Therapy Aichi Medical University School of Medicine Nagakute Japan
18. Division of Stem Cell Regulation, Center for Molecular Medicine Jichi Medical University Shimotsuke Japan
19. Department of Hematology and Oncology, Graduate School of Medicine Kyoto University Kyoto Japan