1. Accident and Trauma Research Center, Urho Kaleva Kekkonen Institute for Health Promotion Research, Tampere, Finland.
2. Division of Orthopaedics and Traumatology, Medical School, University of Tampere, Tampere, Finland.
3. Department of Trauma, Muscoloskeletal Surgery and Rehabilitation, Tampere University Hospital, Tampere, Finland.
4. Department of Family Practice and School of Human Kinetics, University of British Columbia, Vancouver, BC, Canada.
5. Osteoporosis Program, BC Women's Hospital and Health Centre, Vancouver, BC, Canada.
6. Prince of Wales Medical Research Institute, University of New South Wales, Sydney, NSW.