title: Attention deficit hyperactivity disorder. Preface.
authors.affiliation: Attention Deficit Hyperactivity Disorder Outpatient Program, Child and Adolescent Psychiatric Division, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil 90035-003. lrohde@terra.com.br
authors.forename: Luis Augusto
authors.initials: LA
authors.lastname: Rohde
authors.forename: Stephen V
authors.initials: SV
authors.lastname: Faraone
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000209:etiology* / Q000628:therapy; D002648:Child; D006801:Humans; D012307:Risk Factors