1. Department of Orthopedic Biomaterial Science Osaka University Graduate School of Medicine Suita Osaka Japan
2. Department of Information Systems, Faculty of Engineering Saitama Institute of Technology Fukaya Saitama Japan
3. Department of Orthopedics/Rheumatology, Osaka Minami Medical Center National Hospital Organization Kawachinagano Osaka Japan
4. Department of Orthopedic Surgery Osaka University Graduate School of Medicine Suita Osaka Japan