1. NTNU Center for Health Promotion Research, Faculty of Health and Sport, University of Agder, Kristiansand, Norway
2. NTNU Center for Health Promotion Research, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
3. Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway
4. Department of Psychosocial Health, Faculty of Health and Sport, University of Agder, Kristiansand, Norway