How often do children meet ICD-10/DSM-IV criteria of attention deficit-/hyperactivity disorder and hyperkinetic disorder? Parent-based prevalence rates in a national sample--results of the BELLA study. Döpfner, Manfred Breuer, Dieter Wille, Nora Erhart, Michael Ravens-Sieberer, Ulrike 2008 - Forschungsinformationssystem des UKE