title: Infantile autism: a genetic study of 21 twin pairs.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000235:genetics* / Q000523:psychology; D001925:Brain Damage, Chronic / Q000235:genetics; D002648:Child; D002675:Child, Preschool; D003072:Cognition Disorders / Q000235:genetics; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics; D008297:Male; D011247:Pregnancy; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic