Psychiatric aspects of mental retardation in children under eight.
D002648:Child; D002653:Child Behavior Disorders / Q000209:etiology*; D002675:Child, Preschool; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000175:diagnosis*; D010287:Parent-Child Relations; D011618:Psychotic Disorders / Q000209:etiology