1. Department of Orthopedic Surgery, Graduate School of Medicine Mie University Tsu City Mie Japan
2. Department of Orthopedic Surgery, Graduate School of Medicine University of the Ryukyus Nakagami‐gun Okinawa Japan
3. Ceramic Physics Laboratory Kyoto Institute of Technology Kyoto Japan
4. Department of Orthopedic Surgery Tokyo Medical University Tokyo Japan
5. The Center for Advanced Medical Engineering and Informatics Osaka University Osaka Japan
6. Department of Immunology, Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan