Subjects: Anxiety Disorders; Personality Problems; Family (Sociological Unit)
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Subjects: Student Behavior; Twins; Teacher Attitudes
Subjects: Twins; Language Impairments; Developmental Delays
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Subjects: Females; Birth; MothersHungary
Subjects: Genetics; Correlation; Attention Deficit Hyperactivity DisorderCanada
Subjects: Mothers; Twins; Affective BehaviorMichigan
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