1. Department of Pediatrics; Shiga University of Medical Science; Otsu Japan
2. Department of Medical Statistics; Toho University; Tokyo Japan
3. Division of Pediatrics; Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital; Tokyo Japan
4. Department of Human Health Science; Kyoto University; Kyoto Japan
5. Division of Leukemia and Lymphoma, Children's Cancer Center; National Center for Child Health and Development; Tokyo Japan
6. Department of Pediatrics; Toho University Omori Hospital; Tokyo Japan
7. Department of Pediatric Hematology/Oncology; Nagoya First Red Cross Hospital; Nagoya Japan
8. Department of Hematology/Oncology; Ibaraki Children's Hospital; Mito Japan
9. Department of Hematology/Oncology; Saitama Children's Medical Center; Saitama Japan
10. Department of Pediatrics; Yokohama City University; Yokohama Japan
11. Department of Pediatrics; Hiroshima Red Cross Hospital & Atomic-Bomb Survivors Hospital; Hiroshima Japan
12. Department of Cell Transplantation and Regenerative Medicine; Tokai University School of Medicine; Isehara Japan
13. Japanese Red Cross Kinki Block Blood Center; Ibaraki Japan
14. Department of Healthcare Administration; Nagoya University; Nagoya Japan
15. Japanese Data Center for Hematopoietic Cell Transplantation; Nagoya University; Nagoya Japan
16. Department of Pediatrics; Fujita Health University School of Medicine; Toyoake Japan