1. Department of Neurology, Tosei General Hospital, Japan
2. Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Japan
3. Department of Neurology, Graduate School of Medical Science, Kumamoto University, Japan
4. Department of Neurology, Brain Research Institute, Niigata University, Japan
5. Department of Radiology, National Center for Geriatrics and Gerontology, Japan
6. Department of Neurology, Nagoya City East Medical Center, Japan