1. Department of Psychiatry and Behavioural Sciences, University of Washington School of Medicine, Seattle, Washington
2. Department of Child Psychiatry and Behavioural Medicine, Seattle Children's Hospital, Seattle, Washington
3. Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington
4. Seattle Children's Research Institute, Seattle Children's Hospital, Seattle, Washington
5. Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington
6. Department of Psychiatry, Institute for Juvenile Research, University of Illinois at Chicago, Chicago, Illinois, USA