1. Department of Orthopaedic Surgery, Wakayama Medical University
2. Department of Medical Research and Management for Musculoskeletal Pain, Faculty of Medicine, 22nd Century Medical and Research Center, The University of Tokyo
3. Department of Orthopaedic Surgery, Sagamihara Hospital, National Hospital Organization
4. Department of Spine Surgery, Tokyo Yamate Medical Center, Japan Community Healthcare Organization
5. Department of Biomedical Engineering, Faculty of Biology-Oriented Science and Technology, KinDai University