1. Danish Ramazzini Center, Department of Occupational Medicine, Aarhus University Hospital, Aarhus, Denmark
2. Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University Hospital, Lund, Sweden
3. Department of Environmental Medicine, University of Southern Denmark, Odense, Denmark
4. Department of Occupational Medicine, Herning Regional Hospital, Herning, Denmark
5. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
6. Department of Occupational and Environmental Medicine, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark