1. Psychometrics and Measurement Lab, Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology, and NeurosciencesKing's College London London UK
2. MRC Social Genetic Developmental and Psychiatry Centre, Institute of Psychiatry, Psychology, and NeurosciencesKing's College London London UK
3. Psychiatry DepartmentUniversidad Autónoma de Madrid Madrid Spain
4. Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental HealthMedical Faculty Mannheim/Heidelberg University Mannheim Germany
5. Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and BehaviourRadboud University Medical Center Nijmegen The Netherlands
6. Clinic for Child and Adolescent Psychiatry and PsychotherapyUniversity of Duisburg‐Essen Essen Germany
7. Clinic for Child and Adolescent Psychiatry and PsychotherapyUniversity Medical Center Göttingen Germany
8. Department of Child and Adolescent PsychiatryUniversity of Zurich Zurich Switzerland
9. Clinical Psychology and Epidemiology, Department of PsychologyUniversity of Basel Basel Switzerland
10. Child and Adolescent Mental Health CenterCapital Region Psychiatry Copenhagen Denmark
11. Department of Child and Adolescent PsychiatrySouthern Denmark University Odense Denmark
12. Departments of Psychiatry and of Neuroscience and PhysiologySUNY Upstate Medical University Syracuse New York USA
13. Complex Attention and Hyperactivity Disorders Service (CAHDS), Specialised Child and Adolescent Mental Health Services (CAMHS)WA Department of Health Perth Western Australia Australia
14. Centre and Discipline of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, School of Medicine, Division of Paediatrics and Child Health and Division of Psychiatry and Clinical NeurosciencesThe University of Western Australia Perth Western Australia Australia