1. Kitakyushu Yahata Higashi Hospital; Kitakyushu Fukuoka
2. Department of Laboratory Medicine; Tokyo Medical University; Tokyo
3. Japanese Red Cross Aichi Blood Center; Seto Aichi
4. Department of Paediatrics; Nara Medical University; Kashihara Nara
5. Department of Haematology; Ogikubo Hospital; Tokyo
6. Department of Paediatrics; Nihon University Itabashi Hospital; Tokyo
7. Department of Joint Surgery; Research Hospital of the Institute of Medical Science; The University of Tokyo; Tokyo
8. Department of Haematology and Oncology; Seirei Hamamatsu General Hospital; Hamamatsu Shizuoka
9. Department of Transfusion Medicine; Nagoya University Hospital; Nagoya
10. Department of Paediatrics; National Hospital Organization Osaka National Hospital; Osaka
11. Division of Haematology; Department of Internal Medicine; Hyogo College of Medicine; Nishinomiya Hyogo
12. Department of Haematology and Oncology; Kobe Children's Hospital; Kobe
13. Division of the Blood Transfusion; Hiroshima University Hospital; Hiroshima
14. Department of Paediatrics; University of Occupational and Environmental Health; Kitakyushu Fukuoka
15. Department of Paediatrics; Kumamoto Red Cross Hospital; Kumamoto
16. Department of Paediatrics; Kagoshima City Hospital; Kagoshima
17. Department of Biostatistics; School of Public Health; The University of Tokyo; Tokyo
18. National Hospital Organization Nagoya Medical Center; Nagoya Japan