1. Centre for Research and DevelopmentRegion Gävleborg/Uppsala University Gävle Sweden
2. Department of Public Health and Caring SciencesUppsala University Uppsala Sweden
3. Faculty of Health and Occupational Studies, Centre for Musculoskeletal DisorderUniversity of Gävle Gävle Sweden
4. Faculty of Health and Occupational Studies, Department of Health and Caring SciencesUniversity of Gävle Gävle Sweden