1. Department of Occupational Medicine, Danish Ramazzini Centre, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus N, Denmark
2. Section for Biostatistics, Department of Public Health, Aarhus University, Bartholins Allé 2, Aarhus C, Denmark
3. Environment, Occupation and Health, Department of Public Health, Danish Ramazzini Centre, Aarhus University, Bartholins Allé 2, Aarhus C, Denmark
4. National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen Ø, Denmark
5. Institute of Occupational Medicine, Research Avenue North, Riccarton, Edinburgh, UK
6. Department of Occupational and Environmental Medicine, Bispebjerg University Hospital, Bispebjerg Bakke 23F, Copenhagen NV, Denmark
7. Environmental Epidemiology Division, Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
8. CRECEA, Kongsvang Alle 25, Aarhus C, Denmark