1. Department of Orthopaedic Surgery The University of Tokyo Tokyo Japan
2. Department of Physiological Science and Molecular Biology Fukuoka Dental College Fukuoka Japan
3. Department of Orthopedic Surgery Keio University School of Medicine Tokyo Japan
4. Department of Experimental Immunology Institute of Development, Aging and Cancer, Tohoku University Sendai Fukuoka Japan
5. Department of Orthopaedic Surgery Kumamoto University Kumamoto Japan