1. Department of Neurology Graduate School of Medical Sciences, Kumamoto University Kumamoto Japan
2. Department of Neurology International University of Health and Welfare Narita Hospital Narita Japan
3. Department of Neurology National Center Hospital, National Center of Neurology and Psychiatry Tokyo Japan
4. Department of Orthopaedic Surgery National Hospital Organization Osaka Minami Medical Center Osaka Japan
5. Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
6. Department of Neurology Aichi Medical University School of Medicine Nagakute Aichi Japan
7. Department of Clinical Research Education Nagoya University Graduate School of Medicine Nagoya Japan
8. Department of Neurology Tohoku University Graduate School of Medicine Sendai Japan