Attention-deficit hyperactivity disorder (ADHD) is a clinically and genetically heterogeneous
syndrome which is comorbid with childhood conduct disorder, alcoholism, substance abuse …

Decades of research show that genes play an vital role in the etiology of attention deficit
hyperactivity disorder (ADHD) and its comorbidity with other disorders. Family, twin, and …

Reviews of the literature leave no doubt that genes influence the etiology of attention-
deficit/hyperactivity disorder (ADHD)(Faraone et al., 1998). Notably, twin studies show the …

Attention deficit hyperactivity disorder (ADHD) is a common, childhood-onset
neurodevelopmental disorder with adverse consequences during adult life. Family, twin and …

Attention‐deficit hyperactivity disorder (ADHD) is one of the most common psychiatric
disorders of childhood. The role of genetic factors in its etiology is strongly supported by …

Attention-deficit/hyperactivity disorder (ADHD) is a highly disruptive childhood-onset
disorder that often persists into adolescence and adulthood. Comorbidity with other …

As heritability is high in attention-deficit/hyperactivity disorder (ADHD), genetic factors must
play a significant role in the development and course of this disorder. In recent years a large …

Complex genetic traits refer to those phenotypes not fitting patterns of Mendelian
segregation and/or assortment but exhibiting a preferential familial clustering that cannot be …

Attention deficit hyperactivity disorder (ADHD) is highly heritable but is likely a complex
disorder involving multiple genes of moderate effect (Smalley [1997: Am J Hum Genet 60 …

Attention-deficit/hyperactivity disorder (ADHD) is a complex neurodevelopmental disorder
that almost certainly represents the common outcome of multiple causal pathways and it is …