1. HUNT Research Centre, Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Verdal, Norway, , Department of Psychiatry, Levanger Hospital, Levanger, Norway
2. Unit for Applied Clinical Research, Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
3. HUNT Research Centre, Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Verdal, Norway
4. Human Movement Science Programme, Faculty of Social Sciences and Technology Management, Norwegian University of Science and Technology, Trondheim, Norway