1. Brain and Circulation Research Group, Department of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway
2. Research Group of Epidemiology of Chronic Diseases, Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway
3. Centre for Sami Health Research, Department of Community Medicine, Faculty of Health Science, University of Tromsø, Tromsø, Norway