1. Department of Paediatrics; St. Luke's International Hospital; Tokyo Japan
2. Department of Paediatrics; Institute of Haematology and Blood Disease Hospital; Chinese Academy of Medical Sciences; Tianjin China
3. Division of Paediatric Haematology and Oncology; Department of Paediatrics and Adolescent Medicine; University of Freiburg; Freiburg Germany
4. Clinical Laboratory; Research Hospital; The Institution of Medical Science; The University of Tokyo; Tokyo Japan
5. Paediatric Haematology/Oncology; Ibaraki Children's Hospital; Mito Japan
6. Department of Surgical Pathology; Showa University Fujigaoka Hospital; Yokohama Japan
7. Department of Paediatrics; Nagoya University Graduate School of Medicine; Nagoya Japan
8. Department of Pathology; Japanese Red Cross Nagoya First Hospital; Nagoya Japan
9. Centre for iPS Cell Research and Application; Kyoto University; Kyoto Japan