Willcutt EG, Pennington BF, DeFries JC (2000) Etiology of inattention and hyperactivity/impulsivity in a community sam- ple of twins with learning difficulties. J Abnorm Child Psychol 28:149-159
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Willcutt, E. G., Pennington, B. F., DeFries, J. C. (2000). Etiology of inattention and hyperactivity/impulsivity in a community sam- ple of twins with learning difficulties. J Abnorm Child Psychol, 28 pp. 149-159.
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