1. Research Unit of Population Health, University of Oulu, Oulu, Finland
2. Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
3. Rovaniemi Health Center, Rovaniemi, Finland
4. Western Uusimaa Wellbeing Services County, Social and Health Care Services, Espoo, Finland
5. Sydney Musculoskeletal Health, School of Health Sciences, Charles Perkins Centre, University of Sydney, Sydney, Australia
6. Sydney Musculoskeletal Health, The Kolling Institute, School of Health Sciences, University of Sydney, Sydney, Australia
7. Alan Edwards Pain Centre for Research on Pain, McGill University, Montreal, Canada
8. Faculty of Medicine, Université de Montréal, Montreal, Canada
9. Rehabilitation Services of South Karelia Social and Health Care District, Lappeenranta, Finland