title: Validity of DSM-IV attention deficit/hyperactivity disorder for younger children.
authors.forename: F
authors.initials: F
authors.lastname: Clark-Jones
mesh_terms: D000367:Age Factors; D001289:Attention Deficit Disorder with Hyperactivity / Q000145:classification* / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D003953:Diagnosis-Related Groups / Q000145:classification* / Q000592:standards*; D003951:Diagnostic Errors; D006801:Humans; D007223:Infant; D015203:Reproducibility of Results