Hyperactivity in twins.
D000293:Adolescent; D000375:Aging; D001722:Birth Order; D001925:Brain Damage, Chronic / Q000175:diagnosis*; D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis* / Q000235:genetics*; D003937:Diagnosis, Differential; D004200:Diseases in Twins / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D011581:Psychological Tests; D012924:Social Conditions