1. Department of Rehabilitation, Dokkyo Medical University School of Medicine: 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan
2. Department of Physical Therapy, Aoi Medical Academy, Japan
3. Department of Physical Therapy, Makuhari Human Care Faculty, Tohto University, Japan
4. Department of Regulatory Physiology, Dokkyo Medical University School of Medicine, Japan