1 Danish Ramazzini Centre, Department of Occupational Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus N, Denmark. ALEXJN@rm.dk.
2 Danish Ramazzini Centre, Department of Occupational Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus N, Denmark.
3 Danish Ramazzini Centre, Department of Occupational Medicine-University Research Clinic, Regional Hospital Goedstrup, Herning, Denmark.
4 Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.