1. Department of Paediatrics; Teikyo University School of Medicine; Tokyo; Japan
2. Department of Paediatrics; St Luke's International Hospital; Tokyo; Japan
3. Department of Paediatrics; Hyogo Medical College; Hyogo; Japan
4. Department of Paediatrics; Hiroshima Red Cross Hospital; Hiroshima; Japan
5. Department of Paediatrics; Nagoya University Graduate School of Medicine; Nagoya; Japan
6. Section of Paediatrics; Kyushu Cancer Centre Hospital; Fukuoka; Japan
7. Institute of iPS cell; Kyoto University; Kyoto; Japan