1. Research Unit of Population Health University of Oulu Oulu Finland
2. Medical Research Center Oulu Oulu University Hospital, University of Oulu Oulu Finland
3. Rovaniemi Health Center Rovaniemi Finland
4. Charles Perkins Centre Musculoskeletal Hub, School of Health Sciences, Faculty of Medicine University of Sydney Sydney New South Wales Australia
5. Primary Health Care Services Espoo Finland
6. Rehabilitation Services of South Karelia Social and Health Care District Lappeenranta Finland