1. Division of Pediatrics, Faculty of Medicine University of Miyazaki Miyazaki Japan
2. Department of Clinical Biostatistics, Graduate School of Medicine Kyoto University Kyoto Japan
3. Department of Pediatrics Osaka University Graduate School of Medicine Osaka Japan
4. Department of Pediatrics National Hospital Organization Kyushu Cancer Center Fukuoka Japan
5. Department of Pediatrics Yokohama City University Hospital Yokohama Japan
6. Department of Pediatrics Okayama University Okayama Japan
7. Department of Pediatrics Hirosaki University Graduate School of Medicine Hirosaki Japan
8. Department of Hematology/Oncology Tokyo Metropolitan Children's Medical Center Fuchu Japan
9. Department of Hematology/Oncology Saitama Children's Medical Center Saitama Japan
10. Division of Hemato‐oncology/Regenerative Medicine Kanagawa Children's Medical Center Yokohama Japan
11. Department of Hematology/Oncology Chiba Children's Hospital Chiba Japan
12. Clinical Research Center National Hospital Organization Nagoya Medical Center Nagoya Japan
13. Department of Pediatrics St. Luke's International Hospital Tokyo Japan
14. Department of Pediatrics Mie University Graduate School of Medicine Tsu Japan
15. Department of Pediatrics Shiga University of Medical Science Otsu Japan
16. Department of Human Health Sciences Kyoto University Kyoto Japan
17. Division of Leukemia and Lymphoma Children's Cancer Center National Center for Child Health and Development Tokyo Japan