1. Department of Hematology Kobe City Hospital Organization, Kobe City Medical Center General Hospital Kobe Japan
2. Department of Environmental Medicine and Population Science, Graduate School of Medicine Osaka University Osaka Japan
3. Division of Biomedical Statistics, Department of Integrated Medicine Graduate School of Medicine, Osaka University Osaka Japan
4. Department of Hematology Kanagawa Cancer Center Yokohama Japan
5. Department of Hematology Yokohama Municipal Citizen's Hospital Kawasaki‐shi Kanagawa Japan
6. Transfusion and Cell Therapy Unit Nagasaki University Hospital Nagasaki‐shi Nagasaki Japan
7. Department of Hematology Chiba University Hospital Chiba‐shi Chiba Japan
8. Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
9. Department of Hematology Hiroshima Red Cross Hospital and Atomic‐bomb Survivors Hospital Hiroshima Japan
10. Department of Hematopoietic Stem Cell Transplantation National Cancer Center Hospital Tokyo Japan
11. Department of Hematology and Oncology Anjo Kosei Hospital Anjo‐shi Aichi Japan
12. Department of Hematology/Oncology, Kurashiki Central Hospital Kurashiki Okayama Japan
13. Department of Hematology Osaka Metropolitan University, Graduate School of Medicine Abeno‐ku Osaka Japan
14. Division of Hematology Ehime Prefectural Central Hospital Matsuyama‐shi Ehime Japan
15. Department of Hematology and Oncology, Graduate School of Medicine Kyoto University Kyoto Japan
16. Department of Hematology Sapporo Hokuyu Hospital Sapporo Japan
17. Division of Hematology, Department of Medicine Keio University School of Medicine Tokyo Japan
18. Division of Molecular Oncology National Cancer Center Research Institute Tokyo Japan
19. Department of Hematology Japanese Red Cross Aichi Medical Center, Nagoya Daiichi Hospital Nagoya‐shi Aichi Japan
20. Japanese Data Center for Hematopoietic Cell Transplantation Nagakute Japan
21. Department of Registry Science for Transplant and Cellular Therapy Aichi Medical University School of Medicine Nagakute Japan
22. Department of Hemaology National Center for Global Health and Medicine Tokyo Japan