1. Department of Orthopedic Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan,
2. Department of Clinical Motor System Medicine,
3. Department of Medical Research and Management for Musculoskeletal Pain,
4. Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo, Tokyo, Japan,
5. Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan,
6. Department of Orthopedic Surgery, Japan Community Health care Organization Tokyo Shinjuku Medical Center, Tokyo, Japan, and
7. National Rehabilitation Center for Persons with Disabilities, Saitama, Japan