1. School of Academic Psychiatry, Institute of Psychology, Psychiatry and Neuroscience King's College London London UK
2. Department of Child and Adolescent Psychiatry Aarhus University Aarhus Denmark
3. Division of Behavioral Medicine and Clinical Psychology Cincinnati Children's Hospital Medical Center Cincinnati OH USA
4. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati OH USA
5. Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
6. Division of Child and Adolescent Psychiatry, Center for Psychiatry Research Stockholm County Council Stockholm Sweden
7. Department of Child and Adolescent Psychiatry New York University Grossman School of Medicine New York NY USA
8. Nathan Kline Institute for Psychiatric Research Orangeburg NY USA
9. Departments of Human Genetics and Psychiatry, Donders Institute for Brain, Cognition and Behaviour Radboud University Medical Center Nijmegen The Netherlands
10. Icahn School of Medicine at Mount Sinai New York NY USA
11. Department of Psychiatry Oregon Health and Science University Portland OR USA
12. ADHD Outpatient Program and Developmental Psychiatry Program, Hospital de Clinica de Porto Alegre Federal University of Rio Grande do Sul Porto Alegre Brazil
13. National Institute of Developmental Psychiatry Sao Paulo Brazil