Gert Doekes, Division of Environmental Epidemiology, Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, The Netherlands., Netherlands
Ioannis Basinas, Centre for Human Exposure Science (CHES), Institute of Occupational Medicine (IOM), Edinburgh, EH14 4AP, UK.
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Øyvind Omland, Aalborg University Hospital, Clinic of Occupational Medicine, Danish Ramazzini Center, Aalborg, Denmark.