Frequency of repetitive behaviors in early infantile autism and its variants.
D001321:Autistic Disorder / Q000209:etiology*; D001332:Automatism; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009043:Motor Activity; D010465:Perception; D010469:Perceptual Distortion; D012561:Schizophrenia, Childhood / Q000209:etiology*