1. 1Department of Medical Genetics, Tohoku University School of Medicine, Sendai, Japan;
2. 2Department of Pediatrics, Yokohama City University Hospital, Yokohama, Japan;
3. 3YCU Center for Novel and Exploratory Clinical Trials, Yokohama City University Hospital, Yokohama, Japan;
4. 4Department of Pediatrics, Tohoku University Graduate School of Medicine, Sendai, Japan;
5. 5Department of Hematology and Oncology, Miyagi Children’s Hospital, Sendai, Japan;
6. 6Division of Cell Proliferation, and
7. 7Division of Interdisciplinary Medical Sciences, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan; and
8. 8Department of Microbiology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan