1. Department of Pediatrics Nagoya University Graduate School of Medicine Nagoya Japan
2. Department of Hematology and Oncology, Children's Medical Center Japanese Red Cross Aichi Medical Center Nagoya First Hospital Nagoya Japan
3. Department of Pediatrics Hiroshima University Graduate School of Biomedical & Health Sciences Hiroshima Japan
4. Department of Pediatric Hematology and Oncology Japanese Red Cross Narita Hospital Narita Japan
5. Division of Pediatric Hematology/Oncology Okinawa Prefectural Nanbu Medical Center and Children's Medical Center Okinawa Japan
6. Department of Pediatrics Kobe University Graduate School of Medicine Kobe Japan
7. Department of Pediatrics Fujita Health University School of Medicine Toyoake Japan
8. Department of Pediatrics, Kitano Hospital Tazuke Kofukai Medical Research Institute Osaka Japan
9. Department of Hematology and Oncology Shizuoka Children's Hospital Shizuoka Japan
10. Department of Pathology Shizuoka Children's Hospital Shizuoka Japan
11. Department of Pathology Japanese Red Cross Aichi Medical Center Nagoya First Hospital Nagoya Japan
12. Department of Virology Nagoya City University Graduate School of Medical Science and Medical School Nagoya Japan