title: Validity of DSM-IV ADHD.
authors.forename: B B
authors.initials: BB
authors.lastname: Lahey
authors.forename: B
authors.initials: B
authors.lastname: Applegate
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results