title: Editorial comment.
authors.forename: Piet
authors.initials: P
authors.lastname: Hoebeke
mesh_terms: D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000453:epidemiology*; D016022:Case-Control Studies; D002648:Child; D015897:Comorbidity; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D012016:Reference Values; D012720:Severity of Illness Index; D014555:Urination Disorders / Q000175:diagnosis / Q000453:epidemiology*