Description:
<jats:title>Summary</jats:title><jats:p>Attention-deficit hyperactivity disorder (ADHD) varies in its clinical
presentation and course. Susceptibility gene variants for ADHD and
associated antisocial behaviour are being identified with emerging evidence
of gene–environment interaction. Genes and environmental factors that
influence the origins of disorder are not necessarily the same as those that
contribute to its course and outcome.</jats:p>