1. Department of PediatricsGraduate School of MedicineThe University of Tokyo Tokyo Japan
2. Department of Hematology/OncologySaitama Children's Medical Center Saitama Japan
3. Department of Cell Therapy and Transplantation MedicineThe University of Tokyo Hospital Tokyo Japan
4. Department of PathologySaitama Children's Medical Center Saitama Japan
5. Department of Pathology and Clinical LaboratoriesNational Cancer Center Hospital Tokyo Japan
6. Department of Pathology and Tumor BiologyGraduate School of MedicineKyoto University Kyoto Japan
7. Department of PediatricsGraduate School of MedicineKyoto University Kyoto Japan