1. Department of Pediatrics Hamamatsu University School of Medicine Hamamatsu Japan
2. Clinical Research Center National Hospital Organization Nagoya Medical Center Nagoya Japan
3. Department of Pediatrics Kyoto Prefectural University of Medicine Kyoto Japan
4. Department of Hematology and Oncology Tokyo Metropolitan Children's Medical Center Tokyo Japan
5. Department of Pediatric Oncology National Cancer Center Hospital Tokyo Japan
6. Department of Pediatrics Niigata University Niigata Japan
7. Department of Pediatrics Miyazaki Prefectural Miyazaki Hospital Miyazaki Japan
8. Department of Pediatrics Hiroshima Red Cross Hospital and Atomic‐bomb Survivors Hospital Hiroshima Japan
9. Department of Pediatric Hematology/Oncology Osaka City General Hospital Osaka Japan
10. Department of Pediatrics Shimane University Faculty of Medicine Izumo Japan
11. Department of Pediatrics Ehime University Toon Japan
12. Division of Stem Cell Transplant and Cellular Therapy Children's Cancer Center National Center for Child Health and Development Tokyo Japan
13. Department of Pediatrics Toho University Omori Medical Center Tokyo Japan
14. Department of Pediatrics Nakadori General Hospital Akita Japan
15. Department of Pediatrics Mie University Tsu Japan
16. Department of Pediatrics Osaka University Suita Japan
17. Department of Pediatric Hematology and Oncology Research Research Institute National Center for Child Health and Development Tokyo Japan
18. Department of Medical Technology Kyorin University Faculty of Health Sciences Mitaka Japan
19. Department of Pediatrics Hokkaido University Graduate School of Medicine Sapporo Japan
20. Department of Hematology/Oncology Miyagi Children's Hospital Sendai Japan
21. Department of Hematology/Oncology Saitama Children's Medical Center Saitama Japan