1. Department of Neuro‐Medical Science, Graduate School of Medicine Osaka University Suita Japan
2. Sohyaku, Innovative Research Division Mitsubishi Tanabe Pharma Corporation Yokohama Japan
3. Department of Molecular Neurosciences, Graduate School of Medicine Osaka University Suita Japan
4. Department of Neurology Tenri Hospital Tenri Japan
5. Department of Neurology Tohoku University Graduate School of Medicine Sendai Japan
6. WPI‐Immunology Frontier Research Center Osaka University Suita Japan