1. Department of Neurology; Geriatrics Research Institute and Hospital; Maebashi Japan
2. Department of Neurology; Gunma University Graduate School of Medicine; Maebashi Japan
3. Department of Internal Medicine; Kiboukan Hospital; Takasaki Japan
4. Department of Histopathology and Cytopathology; Gunma University Graduate School of Health Sciences; Maebashi Japan
5. Department of Neuropathology and Cell Biology; Tokyo Metropolitan Institute of Medical Science; Tokyo Japan
6. Department of Internal Medicine; Geriatrics Research Institute and Hospital; Maebashi Japan