1. Department of Orthopaedic Surgery; Shinshu University School of Medicine; Asahi 3-1-1 Matsumoto 390-8621 Japan
2. Mecganicl Systems Engineering; Shinshu University Faculty of Engineering; Wakasato 4-17-1 Nagano 380-8553 Japan
3. Institute for Biomedical Sciences; Interdisciplinary Cluster for Cutting Edge Research; Shinshu University; Matsumoto 390-8621 Japan
4. Department of Applied Physical Therapy; Shinshu University School of Health Sciences; Asahi 3-1-1 Matsumoto 390-8621 Japan