1. Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan;
2. Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan;
3. Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan;
4. Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan;
5. Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan