1. HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology , Trondheim, Norway
2. Levanger Hospital, Nord-Trøndelag Hospital Trust , Levanger, Norway
3. Department of Community Medicine, Center for Sami Health Research, Arctic University of Norway , Tromso, Norway
4. HUNT Center for Molecular and Clinical Epidemiology, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology) , Trondheim, Norway
5. Department of Research, St Olav’s Hospital , Trondheim, Norway