1. Department of Pediatrics/Pediatric Hematology and Oncology, Okayama University Hospital, Okayama 700‑8558, Japan
2. Department of Pediatrics, Hokkaido University Hospital, Sapporo, Hokkaido 060‑8648, Japan
3. Division of Medical Support, Okayama University Hospital, Okayama 700‑8558, Japan
4. Department of Pediatrics, Kochi Health Sciences Center, Kochi 781‑8555, Japan
5. Division of Biobank, Center for Comprehensive Genomic Medicine, Okayama University Hospital, Okayama 700‑8558, Japan
6. Department of Pediatrics, St. Marianna University School of Medicine Hospital, Kawasaki, Kanagawa 216‑8511, Japan
7. Clinical Research Center, National Hospital Organization Nagoya Medical Center, Nagoya, Aichi 460‑0001, Japan