title: The age at onset of attention deficit hyperactivity disorder.
authors.affiliation: Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, Porto Alegre, Brazil.
authors.forename: Christian
authors.initials: C
authors.lastname: Kieling
authors.forename: Renata R
authors.initials: RR
authors.lastname: Kieling
authors.forename: Luis Augusto
authors.initials: LA
authors.lastname: Rohde
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Frick
authors.forename: Terrie
authors.initials: T
authors.lastname: Moffitt
authors.forename: Joel T
authors.initials: JT
authors.lastname: Nigg
authors.forename: Rosemary
authors.initials: R
authors.lastname: Tannock
authors.forename: Francisco Xavier
authors.initials: FX
authors.lastname: Castellanos
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D017668:Age of Onset; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000523:psychology; D002648:Child; D019992:Databases as Topic / Q000706:statistics & numerical data; D039721:Diagnostic and Statistical Manual of Mental Disorders; D006801:Humans; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011594:Psychometrics; D012107:Research Design