1. Faculty of Social Sciences, Unit of Health Sciences, Tampere, Finland
2. Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, Finland
3. Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg Hospital, The Capital Region of Denmark, Denmark
4. Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
5. Danish Heart Foundation, Copenhagen, Denmark
6. Department of Alcohol, Tobacco and Drugs, Norwegian Institute of Public Health, Oslo, Norway
7. Department of Adolescent Psychiatry, Tampere University Hospital, Tampere, Finland