1. Kohnodai Hospital, National Center for Global Health and Medicine Department of Orthopedic Surgery, , 1-7-1 Kohnodai, Ichikawa City, Chiba 272-8516, Japan
2. Graduate School of Medicine, Chiba University Department of Orthopedic Surgery, , 1-8-1 Inohana, Chuo-ku, Chiba city, Chiba 260-8670, Japan
3. Kohnodai Hospital, National Center for Global Health and Medicine Department of Rheumatism and Collagen Diseases, , 1-7-1 Kohnodai, Ichikawa City, Chiba 272-8516, Japan