1. ADHD Outpatient Clinic; Hospital de Clínicas de Porto Alegre; Porto Alegre Brazil
2. Department of Psychiatry; Faculdade de Medicina; Federal University of Rio Grande do Sul; Porto Alegre Brazil
3. Department of Genetics; Instituto de Biociências; Federal University of Rio Grande do Sul; Porto Alegre Brazil
4. National Institute of Developmental Psychiatry for Children and Adolescents; São Paulo Brazil