1. Faculty of Health SciencesDepartment of Community Medicine, Centre for Sami Health Research, UiT The Arctic University of Norway, Tromsø, Norway
2. Norwegian Institute of Public Health Nydalen Oslo, Norway
3. Faculty of Health SciencesDepartment of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway
4. Department of MedicineUniversity Hospital of Northern Norway, Harstad, Norway