1. Department of Nutrition and Public Health, University of Agder, 4630 Kristiansand, Norway
2. Department of Sport Science and Physical Education, University of Agder, 4630 Kristiansand, Norway
3. Department of Health and Inequality, Norwegian Institute of Public Health, 0213 Oslo, Norway
4. Department of Health and Nursing Sciences, University of Agder, 4630 Kristiansand, Norway
5. Division of Mental and Physical Health, Norwegian Institute of Public Health, 0213 Oslo, Norway
6. Department of Nutrition, Faculty of Medicine, University of Oslo, 0315 Oslo, Norway