1. Center for Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases
2. Department of Hematology/Oncology, Osaka Medical Center and Research Institute for Maternal and Child Health
3. Department of Pediatric Surgery, Children's Medical Center, Osaka City General Hospital
4. Children's Medical Center, Osaka City General Hospital
5. Department of Pediatrics, Osaka University Graduate School of Medicine
6. Department of Pediatrics, Kinki University School of Medicine
7. Department of Pediatrics, Osaka City University Graduate School of Medicine