1. Haematology Clinic, The Third Clinical Department and
2. Section of Haematology/ Oncology, National Children's Hospital, Setagaya, Tokyo,
3. Department of Paediatrics, Faculty of Medicine, Mie University, Tsu, Mie,
4. Section of Haematology/Oncology, Shizuoka Children's Hospital, Shizuoka, Shizuoka,
5. Department of Paediatrics, Kanazawa University School of Medicine, Kanazawa, Kanazawa, Japan
6. Department of Cancer Chemotherapy, Saitama Cancer Centre Hospital, Ina, Saitama,