1. Department of Orthopaedic Surgery, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
2. Department of Rehabilitation, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
3. Department of Physical and Occupational Therapy, Department of Clinical Medicine, Copenhagen University Hospital, University of Copenhagen, Copenhagen, Denmark
4. Global Health Promotion, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
5. Department of Health Informatics and Policy, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
6. Department of Orthopaedic Surgery, Dokkyo Medical University, Saitama Medical Center, Tokyo, Japan