1. Department of Neurology, Graduate School of Medicine; Chiba University; Chiba
2. Department of Global Clinical Research, Graduate School of Medicine; Chiba University; Chiba
3. Department of Neurology; Keio University School of Medicine; Tokyo
4. Department of Neurology and Neurological Science; Tokyo Medical and Dental University; Tokyo
5. Department of Neurology; Juntendo University School of Medicine; Tokyo
6. Department of Neurology, Saitama Medical Center; Saitama Medical University; Saitama
7. Department of Neurology; Kitasato University School of Medicine; Kanagawa
8. Department of General Thoracic Surgery; Chiba University Graduate School of Medicine; Chiba Japan