1. Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
2. Division of Rehabilitation, Chiba University Hospital, Chiba, Japan
3. Department of Neurology, Chiba University, Chiba, Japan
4. Department of Neurology, Chiba Saiseikai Narashino Hospital, Chiba, Japan
5. Department of Neurology, Chiba East Hospital, Chiba, Japan
6. Department of Neurology, Chiba Rosai Hospital, Chiba, Japan
7. Department of Rehabilitation, Graduate School of Medicine, Chiba University, Chiba, Japan