1. Department of Pediatrics Keio University School of Medicine Tokyo Japan
2. Clinical Research Center National Hospital Organization Nagoya Medical Center Aichi Japan
3. Sugita Genpaku Memorial Obama Municipal Hospital Fukui Japan
4. Department of Family Nursing, Division of Health Sciences and Nursing, Graduate School of Medicine The University of Tokyo Tokyo Japan
5. Department of Pediatrics Iwate Prefectural Chubu Hospital Iwate Japan
6. Department of Pediatrics Soma General Hospital Fukushima Japan
7. Department of Hematology/Oncology Tokyo Metropolitan Children's Medical Center Tokyo Japan
8. Department of Pediatrics Niigata Cancer Center Hospital Niigata Japan
9. Department of Pediatrics National Center for Global Health and Medicine Tokyo Japan
10. Department of Hematology/Oncology Saitama Children's Medical Center Saitama Japan
11. Department of Pediatrics Niigata University Graduate School of Medical and Dental Sciences Niigata Japan
12. Department of Hematology and Oncology, Children's Medical Center Japanese Red Cross Nagoya First Hospital Aichi Japan
13. Department of Pediatrics, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
14. Department of Pediatrics Hiroshima Red Cross Hospital & Atomic‐Bomb Survivors Hospital Hiroshima Japan
15. Human Health Sciences Kyoto University Kyoto Japan
16. Department of Pediatrics Ehime University Graduate School of Medicine Ehime Japan