1. Division of Infectious Disease, Department of Pediatrics Hyogo Prefectural Kobe Children's Hospital Kobe City Hyogo Japan
2. Department of Neurosurgery Hyogo Prefectural Kobe Children's Hospital Kobe City Hyogo Japan
3. Division of Hematology and Oncology, Department of Pediatrics Hyogo Prefectural Kobe Children's Hospital Kobe City Hyogo Japan