1. Department of Neurosurgery International University of Health and Welfare, Shioya Hospital Tochigi Japan
2. Department of Neurosurgery Jichi Medical University Tochigi Japan
3. Department of Neurosurgery Koga Red Cross Hospital Ibaraki Japan
4. Divison of Frontier Health Science Tokyo Metropolitan University Graduate School of Human Health Science Tokyo Japan
5. Division of Neurological Gene Therapy Jichi Medical University Tochigi Japan
6. Center for Gene & Cell Therapy, The Institute of Medical Science The University of Tokyo Tokyo Japan