1. Department of Neurology Nagoya City East Medical Center Aichi Japan
2. Department of Radiology Graduate School of Medicine The University of Tokyo Tokyo Japan
3. Department of Neurology Graduate School of Medicine Nagoya City University Aichi Japan
4. Department of Neurology Toyokawa City Hospital Aichi Japan
5. Department of Radiology National Center for Geriatrics and Gerontology Aichi Japan
6. Department of Radiology Nagoya City East Medical Center Aichi Japan
7. Department of Neurology Tominaga Hospital Osaka Japan
8. Department of Neurology Tosei General Hospital Aichi Japan