Prevalence of speech and hearing problems in a child development clinic population.
D002648:Child; D002653:Child Behavior Disorders; D002657:Child Development; D002675:Child, Preschool; D006311:Hearing Disorders / Q000453:epidemiology*; D006801:Humans; D006948:Hyperkinesis; D007484:Iowa; D010044:Outpatient Clinics, Hospital; D012923:Social Class; D013064:Speech Disorders / Q000453:epidemiology*