1. Department of Orthopaedic Surgery, Faculty of Medicine, University of Tokyo, Tokyo, Japan,
2. Department of Orthopaedic Surgery, Sagamihara Hospital, National Hospital Organization, Kanagawa, Japan,
3. Department of Medical Research and Management for Musculoskeltal Pain, 22nd Century Medical & Research Center, Faculty of Medicine, University of Tokyo, Tokyo, Japan,
4. Department of Orthopaedic Surgery, Teikyo University Mizonokuchi Hospital, Kanagawa, Japan, and
5. Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, National Hospital Organization, Kanagawa, Japan