1. Department of Orthopaedic Surgery, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
2. Department of Orthopaedic Surgery, Chihaya Hospital , 2-30-1 Chihaya, Higashi-ku, Fukuoka 813-8501, Japan
3. Department of Rehabilitation Medicine, Kyushu University Hospital , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
4. Department of Medical-Engineering Collaboration for Healthy Longevity, Kyushu University , 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan