1. Department of Pediatrics, Tohoku University School of Medicine
2. Department of Pediatric Hematology and Oncology, Tohoku University School of Medicine
3. Department of Pediatrics, Iwate Medical School
4. Department of Pediatrics, Yamagata University School of Medicine
5. Department of Pediatrics, National Sapporo Hospital
6. Department of Pediatrics, Aichi Medical School