1. Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
2. Section of Sustainable Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
3. Research Unit of Population Health, University of Oulu, Oulu, Finland
4. Department of Occupational and Environmental Medicine, University Hospital of North Norway, Tromsø, Norway