1 HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Levanger, Norway.
3 Regional Centre for Child and Youth Mental Health and Child Welfare, Department of Mental Health, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
4 Department of Public Health and Nursing, Faculty and Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.