1. Division of Rehabilitation Medicine, Dokkyo Medical University Hospital, Tochigi, Japan
2. Department of Regenerative Systems Neuroscience, Human Brain Research Center, Kyoto University, Graduate school of Medicine, Kyoto, Japan
3. Department of Rehabilitation Medicine, Dokkyo Medical University, Tochigi, Japan
4. Department of Physical Therapy, Akita University, Graduate School of Health Sciences, Akita, Japan