Affiliation: | Injury and Osteoporosis Research Center (Drs Kannus and Parkkari) and Tampere Research Center of Sports Medicine (Dr Parkkari), UKK Institute for Health Promotion Research; and Department of Surgery, Medical School, University of Tampere, and Division of Orthopaedics and Traumatology, Department of Trauma, Musculoskeletal Surgery, and Rehabilitation, Tampere University Hospital (Dr Kannus), Tampere, Finland. |