Understanding comorbidity: A twin study
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Erik G. Willcutt; Bruce F. Pennington; Richard K. Olson; John C. DeFries
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Article
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2007
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John Wiley and Sons
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English
β 119 KB
π 1 views
## Abstract A community sample of twins in which at least one member of each pair exhibited significant reading difficulties (99 monozygotic and 80 dizygotic pairs) or symptoms of attentionβdeficit/hyperactivity disorder (ADHD; 83 monozygotic and 78 dizygotic pairs) was used to test the etiology of