1. Department of Regulatory Bioorganic Chemistry, SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Osaka 567-0047, Japan
2. Department of Neurology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
3. Department of System Pathology for Neurological Disorders, Center for Bioresources, Brain Research Institute, Niigata University, Niigata 951-8585, Japan