A twin study.
D000293:Adolescent; D000374:Aggression; D002648:Child; D002675:Child, Preschool; D003192:Compulsive Behavior; D004200:Diseases in Twins; D004569:Electroencephalography; D005260:Female; D006167:Guilt; D006760:Hospitalization; D006801:Humans; D007100:Imitative Behavior; D007621:Karyotyping; D001523:Mental Disorders; D010259:Paranoid Disorders / Q000628:therapy; D010287:Parent-Child Relations; D012723:Sex; D012801:Sibling Relations; D012934:Social Isolation