1. Department of Public Health, Sport and Nutrition; Faculty of Health and Sport Sciences; University of Agder; Kristiansand Norway
2. Faculty of Health Sciences; Oslo and Akershus University College of Applied Sciences; Oslo Norway
3. Faculty of Medicine; University of Oslo; Oslo Norway
4. Department of Endocrinology, Obesity and Preventive Medicine; Oslo University Hospital; Oslo Norway
5. Department of General Practice; Institute of Health and Society; University of Oslo; Oslo Norway