1. Department of Public Health; Hjelt Institute, University of Helsinki; Finland
2. Department of Adolescent Psychiatry; Helsinki University Central Hospital; Helsinki Finland
3. Department of Child Psychiatry; Faculty of Medicine, University of Turku; Finland
4. Department of Mental Health and Substance Abuse Services; National Institute for Health and Welfare; Helsinki Finland
5. Department of Psychiatry; Helsinki University Central Hospital; Finland
6. Information Department; National Institute for Health and Welfare; Helsinki Finland
7. Nordic School of Public Health; Gothenburg Sweden
8. Department of Social Psychiatry; Tampere School of Public Health; Finland