Sleep-walking in twins.
D000328:Adult; D002648:Child; D004200:Diseases in Twins; D004569:Electroencephalography; D004775:Enuresis / Q000150:complications; D005260:Female; D005386:Fingersucking / Q000150:complications; D006801:Humans; D007223:Infant; D008297:Male; D009259:Nail Biting / Q000150:complications; D009519:New York City; D012737:Sex Factors; D013009:Somnambulism / Q000453:epidemiology / Q000235:genetics*