1. Department of Public Health Research Program for Children's Mental Health Section of General Practice Aarhus University Aarhus Denmark
2. Centre of Collaborative Health at Aarhus University Aarhus Denmark
3. Section of Epidemiology Department of Public Health Aarhus University Aarhus Denmark
4. Department of Economics Aarhus University Aarhus Denmark
5. Department of Public Health Section of Biostatistics Aarhus University Aarhus Denmark
6. Nordic School of Public Health Gothenburg Sweden
7. THL National Institute for Health and Welfare HelsinkiFinland
8. University of Turku Turku Finland
9. MRC Social Genetic Developmental Psychiatry King's College London UK