1. Department of Paediatrics, Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan
2. Division of Leukaemia and Lymphoma Children's Cancer Centre, National Centre for Child Health and Development Tokyo Japan
3. National Hospital Organization Clinical Research Centre, Nagoya Medical Centre Nagoya Japan
4. Department of Paediatrics, Graduate School of Medicine Yokohama City University Hospital Yokohama Japan
5. Department of Paediatrics Mie University Graduate School of Medicine Mie Japan
6. Department of Paediatric Haematology and Oncology Research National Centre for Child Health and Development Tokyo Japan
7. Department of Paediatrics Osaka University Osaka Japan
8. Department of Paediatrics Shiga Medical University Otsu Japan
9. Department of Human Health Science Kyoto University Kyoto Japan