1. Department of Lifestyle and Participation; National Institute for Health and Welfare; Helsinki Finland
2. School of Health Sciences; University of Tampere; Tampere Finland
3. Department of Health, Functional Capacity and Welfare; National Institute for Health and Welfare; Helsinki Finland
4. Research Department; Social Insurance Institution; Turku Finland
5. Tampere Center for Child Health Research; University of Tampere and Tampere University Hospital; Tampere Finland
6. Hjelt Institute; University of Helsinki; Helsinki Finland
7. Department of Information; National Institute for Health and Welfare; Helsinki Finland
8. Nordic School of Public Health; Gothenburg; Sweden