1. Department of Paediatrics; Kyoto Prefectural University of Medicine; Graduate School of Medical Science; Kyoto; Japan
2. Department of Paediatrics; Mie University; Tsu; Japan
3. Department of Paediatrics; Shimane University; Matsue; Japan
4. Department of Paediatrics; Nagoya University; Nagoya; Japan
5. Department of Paediatrics; Hirosaki University; Hirosaki; Japan
6. Department of Paediatric Haematology/Oncology; Osaka City General Hospital; Osaka; Japan
7. Department of Paediatrics; Sapporo Hokuyu Hospital; Sapporo; Japan
8. Department of Paediatrics; National Hospital Organization Osaka National Hospital; Osaka; Japan
9. Department of Haematology/Oncology; Hyogo Prefectural Children's Hospital; Kobe; Japan
10. Department of Haematology Oncology; Children's Medical Centre, Japanese Red Cross Nagoya First Hospital; Nagoya; Japan
11. Clinical Research Centre; National Hospital Organization Nagoya Medical Centre; Nagoya; Japan
12. Department of Paediatrics; Okayama University; Okayama; Japan
13. Human Health Sciences; Kyoto University; Kyoto; Japan