1. Department of Pediatrics, Jichi Medical University, Tochigi, Japan
2. Department of Pediatric Neurosurgery, Jichi Children’s Medical Center, Jichi Medical University, Tochigi, Japan
3. Ibaraki eye clinic, Tochigi, Japan
4. Department of Paediatric Orthopaedics and Orthopaedic Surgery, Jichi Children’s Medical Center, Tochigi, Japan
5. Department of Radiology, Jichi Medical University, Tochigi, Japan