1. University of Groningen, University Medical Center Groningen, Department of Health Sciences, Community and Occupational Medicine, Groningen, The Netherlands
2. Dutch Social Security Institute, Institute for Employee Benefits Schemes (UWV), Amsterdam, The Netherlands
3. Research Centre for Insurance Medicine, AMC-UMCG-UWV-VUmc, Amsterdam, The Netherlands
4. Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
5. HELIX Competence Centre, Linköping, Sweden