1. Department of Neurology Kitasato University School of Medicine Sagamihara Japan
2. Department of Neurology Minami‐Nara General Medical Center Nara Japan
3. Department of Neurology Nara Medical University School of Medicine Nara Japan
4. Department of Neurology Japanese Red Cross Otsu Hospital Otsu Japan
5. Department of Neurology Hiroshima City Hiroshima Citizens Hospital Hiroshima Japan
6. Department of Clinical Laboratory Kitasato University Hospital Sagamihara Japan