1. Public Health Research Program, Folkhälsan Research Center, FI Helsinki, Finland
2. Department of Public Health, University of Helsinki, Helsinki, Finland
3. Department of Public Health, University of Turku, Lemminkäisenkatu 1, Turku, Finland
4. University of Skövde, Skövde, Sweden
5. Faculty of Sport and Health Sciences, Research Center for Health Promotion, University of Jyväskylä, FI Jyväskylä, Finland