1. Department of Cancer Pathology, Faculty of Medicine Hokkaido University Sapporo Japan
2. Department of Neurology, Nakamura Memorial Hospital Sapporo Japan
3. Department of Internal Medicine & Neurology Takeuchi Clinic, Doushoukai Medical Corporation Setouchi Japan
4. Institute for Chemical Reaction Design and Discovery (WPI‐ICReDD) Hokkaido University Sapporo Japan
5. Laboratory of Neuropathology, Tokyo Metropolitan Institute of Medical Science Tokyo Japan