1. Department of Pediatrics; The University of Tokyo; Tokyo Japan
2. Department of Cell Therapy and Transplantation Medicine; The University of Tokyo; Tokyo Japan
3. Department of Hematology/Oncology; Saitama Children's Medical Center; Saitama Japan
4. Department of Hematology and Oncology; Children's Medical Center, Japanese Red Cross Nagoya First Hospital; Nagoya Japan
5. Department of Pediatrics; National Kyushu Cancer Center; Fukuoka Japan
6. Department of Pediatrics; Kanazawa University Hospital; Kanazawa Japan
7. Division of Hematology and Oncology; Shizuoka Children's Hospital; Shizuoka Japan
8. Department of Pediatrics; Hokkaido University Hospital; Sapporo Japan
9. Department of Pediatrics; Dokkyo Medical University; Tochgi Japan
10. Department of Hematology/Oncology; Chiba Children's Hospital; Chiba Japan
11. Department of Pediatrics; Ehime University; Toon Japan
12. Department of Cell Transplantation and Regenerative Medicine; Tokai University; Isehara Japan
13. Department of Hematology/Oncology; Osaka Medical Center and Research Institute for Maternal and Child Health; Osaka Japan
14. Japanese Data Center for Hematopoietic Cell Transplantation; Nagoya Japan
15. Nagoya University Graduate School of Medicine; Nagoya Japan
16. Department of Pediatrics; Graduate School of Medicine, Kyoto University; Kyoto Japan