1. Department of Rehabilitation, Showa Inan General Hospital: 3230 Akaho, Komagane-shi, Nagano 399-4117, Japan
2. Department of Human Intelligence Systems, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Japan
3. Osaka Kawasaki Rehabilitation University, Japan
4. Department of Orthopedic Surgery, Shinshu University School of Medicine, Japan