1. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
2. Department of Occupational and Environmental Medicine, Copenhagen University Hospital, Copenhagen, Denmark
3. ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Catalonia, Spain
4. Primary Health Care Clinic, Nuuk, Greenland
5. Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, Netherlands
6. Division of Occupational and Environmental Medicine, Lund University, Lund, Sweden