1. Department of Pediatric Surgery Nihon University School of Medicine Tokyo Japan
2. Division of Registration and Research for Childhood Cancer Research Institute National Center for Child Health and Development Tokyo Japan
3. Department of Pediatric Hematology and Oncology Research Research Institute National Center for Child Health and Development Tokyo Japan
4. Department of Pathology Keio University School of Medicine Tokyo Japan
5. Department of Pathology and Clinical Research Institute Kanagawa Children's Medical Center Yokohama Japan
6. Division of Medical Informatics St Marianna University School of Medicine Kawasaki Japan
7. Department of Pediatric Surgery Hyogo College of Medicine Hyogo Japan
8. Department of Radiology Dokkyo Medical University Saitama Medical Center Koshigaya Japan
9. Department of Pediatrics Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan
10. Research Institute for Clinical Oncology Saitama Cancer Center Saitama Japan
11. Osaka Medical Center and Research Institute for Maternal and Child Health Osaka Japan