1. The Advanced Medical Research Center; Aichi Medical University; Aichi Japan
2. Division of Pediatric Oncology; National Center for Child Health and Development; Tokyo Japan
3. Department of Pediatrics; Yamagata University Hospital; Yamagata Japan
4. Department of Pediatrics; Japanese Red Cross Narita Hospital; Chiba Japan
5. Department of Pediatrics; Sapporo Hokuyu Hospital; Sapporo Japan
6. Department of Pediatrics; Kushu Cancer Center; Fukuoka Japan
7. Department of Pediatrics; Saiseikai Yokohama Nanbu Hospital; Kanagawa Japan
8. Department of Pediatrics; Hiroshima Red Cross Hospital and Atomic Bomb Survivors Hospital; Hiroshima Japan
9. Department of Pediatrics; Kurume University Hospital; Kurume Japan
10. Department of Hematology-Oncology; Saitama Children's Medical Center; Saitama Japan
11. Clinical Research Center; National Center for Child Health and Development; Tokyo Japan
12. Clinical Research Center; National Hospital Organization Nagoya Medical Center; Nagoya Japan
13. Department of Pathology; National Center for Child Health and Development; Tokyo Japan