1. Department of Neurology National Center Hospital, National Center of Neurology and Psychiatry Kodaira Japan
2. Department of Immunology National Institute of Neuroscience, National Center of Neurology and Psychiatry Kodaira Japan
3. Department of Neurology Saitama Medical Center Kawagoe Japan
4. Department of Neurology Kindai University Hospital Osakasayama Japan
5. Department of Neurology Nagasaki Kawatana Medical Center Kawatana Japan
6. Clinical Development Department Asahi‐Kasei Medical Co. Tokyo Japan
7. Department of Neurology Nagasaki National Hospital Nagasaki Japan