1. Department of Pediatrics Graduate School of Medicine Kyoto University Kyoto Japan
2. Japan Children's Cancer Group Relapsed ALL Committee Nagoya Japan
3. Medical‐Industrial Translational Research Center Fukushima Medical University Fukushima Japan
4. Department of Pathology and Tumor Biology Kyoto University Graduate School of Medicine Kyoto Japan
5. Central Institute for Experimental Animals Kawasaki Japan
6. Department of Fundamental Cell Technology Center for iPS Cell Research and Application Kyoto University Kyoto Japan
7. Department of Pediatrics Mie University Graduate School of Medicine Mie Japan
8. Department of Pediatric Oncology National Cancer Center Hospital Tokyo Japan
9. Department of Human Health Sciences Graduate School of Medicine Kyoto University Kyoto Japan
10. Division of Hematology/Oncology Kanagawa Children's Medical Center Yokohama Japan