1. Center for the Developing Brain, Child Mind Institute, New York, New York
2. Graduate Program in Psychiatry and Behavioral Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
3. Section on Negative Affect and Social Processes, Hospital de Clínicas de Porto Alegre, Universidade do Rio Grande do Sul, Porto Alegre, Brazil
4. National Institute of Developmental Psychiatry for Children and Adolescents, São Paulo, Brazil
5. Department of Psychiatry and Legal Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
6. The University of Chicago, Chicago, Illinois
7. Genetic Epidemiology Research Branch, Intramural Research Program, National Institute of Mental Health, Bethesda, Maryland
8. Nathan S. Kline Institute for Psychiatric Research, Orangeburg, New York