1. Institute of Psychiatry, Psychology & Neuroscience; MRC Social, Genetic & Developmental Psychiatry Centre; King's College London; London UK
2. Division of Insurance Medicine; Department of Clinical Neuroscience; Karolinska Institutet; Stockholm Sweden
3. Department of Psychology; George Washington University; Washington DC USA
4. Yale Child Study Center; New Haven CT USA
5. Office of Behavioral and Social Science Research; NIH; Bethesda MD USA
6. Department of Psychology; Pennsylvania State University; PA USA
7. Department of Medical Epidemiology and Biostatistics; Karolinksa Institutet; Stockholm Sweden