1. Department of Dental Hygiene Science University of Oslo Oslo Norway
2. Department of Health, Social and Welfare Studies University of South‐Eastern Norway Bakkenteigen Norway
3. School of Health and Welfare Halmstad University Halmstad Sweden
4. Department of Business, Marketing and Law University of South‐Eastern Norway Hønefoss Norway
5. Department of Public Health – and Sport Science Inland Norway University of Applied Sciences Elverum Norway
6. Department of Sport Science and Physical Education University of Agder Kristiansand Norway
7. Departments of Medicine and of Clinical and Social Psychology University of Rochester Rochester New York USA
8. Department of Clinical and Social Sciences in Psychology University of Rochester Rochester New York USA