1. HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, 7600 Levanger, Norway
2. Levanger Hospital, Nord-Trøndelag Hospital Trust, 7600 Levanger, Norway
3. Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, 7491 Trondheim, Norway
4. Department of Public Health, Faculty of Health Sciences, University of Stavanger, 4021 Stavanger, Norway
5. Faculty of Nursing and Health Sciences, Nord University, 7600 Levanger, Norway