1. Department of Orthopedic Surgery, Kitasato University School of Medicine, 1-15-1 Minami-ku, Kitasato, Sagamihara City, Kanagawa, Japan
2. Department of Bacteriology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Kita-ku Shikata-cho, Okayama, Japan
3. Life Science Research Center, Kagawa University, 1750-1 Kita-gun Miki-cho, Kagawa, Japan
4. Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, Japan
5. Okayama University Medical School, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan