1. Faculty of Social Sciences Tampere University Tampere Finland
2. Methodology Center for Human Sciences University of Jyväskylä Jyväskyla Finland
3. Department of Welfare Finnish Institute for Health and Welfare Helsinki Finland
4. Department of Public Health University of Helsinki Helsinki Finland
5. Environmental Health Unit Finnish Institute for Health and Welfare Kuopio Finland
6. Department of Welfare Finnish Institute for Health and Welfare Tampere Finland