1. Department of Neurosurgery Shinshu University School of Medicine Matsumoto Japan
2. Department of Brain Disease Research Shinshu University School of Medicine Matsumoto Japan
3. Department of Laboratory Medicine Shinshu University School of Medicine Matsumoto Japan
4. Department of Neurology and Rheumatology Shinshu University School of Medicine Matsumoto Japan
5. Department of Pathology Brain Research Institute, Niigata University Niigata Japan
6. Department of Neurology Niigata Prefectural Shibata Hospital Shibata Japan
7. Department of Neurosurgery Jikei University School of Medicine Tokyo Japan