1. Department of Neurology and Geriatrics, Gifu University Graduate School of Medicine, Gifu, Japan;
2. Department of Radiology, Gifu University Graduate School of Medicine, Gifu, Japan;
3. Department of Locomotive Rehabilitation Sciences, Nagasaki University Graduate School of Medicine, Nagasaki, Japan
4. Division of CJD Science and Technology, Department of Prion Research, Center for Translational and Advanced Animal Research on Human Diseases, Tohoku University School of Medicine, Sendai, Japan
5. Faculty of Nursing and Social Welfare Science/ Department of Nursing Sciences, Fukui Prefectural University, Fukui, Japan