1. Department of Occupational Medicine, Danish Ramazzini Centre, Aarhus University Hospital, Aarhus, Denmark
2. Department of Public Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
3. National Research Center for the Working Environment, Copenhagen, Denmark
4. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
5. Occupational and Environmental Medicine, School of Public Health and Community Medicine, Sahlgrenska Academy, University of Goteborg, Goteborg, Sweden
6. Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands