title: ADHD symptom severity and diagnosis remains relatively stable over 6-year period following diagnosis in preschool.
authors.affiliation: Department of Psychology, University of Massachusetts, Amherst, Massachusetts, USA.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Harvey
authors.forename: David H
authors.initials: DH
authors.lastname: Arnold
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male