1. Department of Neuropathology; Hirosaki University Graduate School of Medicine; Hirosaki Japan
2. Department of Neurology; Aomori Prefectural Central Hospital; Aomori Japan
3. Department of Pathology; Center for Bioresource-based Researches; Brain Research Institute, University of Niigata; Niigata Japan
4. Department of Pathological Neuroscience; Center for Bioresource-based Researches; Brain Research Institute, University of Niigata; Niigata Japan
5. Department of Neurology; Hokkaido University Graduate School of Medicine; Sapporo Japan