1. Center for Sport Science and Health Promotion, National Rehabilitation Center for Persons with Disabilities , Tokorozawa, Saitama, Japan
2. Department of Rehabilitation Medicine, The University of Tokyo Hospital , Bunkyo-ku, Tokyo, Japan
3. Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo , Bunkyo-ku, Tokyo, Japan
4. Department of Planning, Information and Management, University of Tokyo Hospital , Bunkyo-ku, Tokyo, Japan
5. Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine , Shitsukawa, Ehime, Japan
6. Department of Orthopaedic Surgery, Hirosaki University Graduate School of Medicine , Hirosaki, Aomori, Japan
7. Department of Orthopaedic Surgery, Hirosaki Memorial Hospital , Hirosaki, Aomori, Japan
8. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University , Sakyo-ku, Kyoto, Japan
9. Department of Orthopaedic Biomaterial Science, Osaka University Graduate School of Medicine , Suita, Osaka, Japan
10. Department of Orthopaedic Surgery, Tokyo Women’s Medical University , Shinjuku, Tokyo, Japan
11. Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University , Chuo-ku, Fukuoka, Japan
12. Biostatistics Division, Clinical Research and Medical Innovation Center, Hokkaido University Hospital , Sapporo, Hokkaido, Japan