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 …

Genetics studies of autism spectrum disorder (ASD) have identified several risk genes that
are key regulators of synaptic plasticity. Indeed, many of the risk genes that have been …

Autism spectrum disorder (autism) is a heterogeneous group of neurodevelopmental
conditions characterized by early childhood-onset impairments in communication and social …

Autism spectrum disorders involve a set of clinical phenotypes that mirror an early onset of
neurodevelopmental deviations, with core symptoms that can probably be related to a …

In the last 30 years, twin studies have indicated a strong genetic contribution to Autism
Spectrum Disorders (ASD). The heritability of ASD is estimated to be 50%, mostly captured …

Despite limited and ambiguous empirical data, substance use-related problems have been
assumed to be rare among patients with autism spectrum disorders (ASD). Using Swedish …

The Child and Adolescent Twin Study in Sweden (CATSS) is an ongoing longitudinal twin
study targeting all twins born in Sweden since July 1, 1992. Since 2004, parents of twins are …

Autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD) have
overlap** characteristics and etiological factors, but to which extent this applies to infant …

Genetic influences play a significant role in risk for psychiatric disorders, prompting
numerous endeavors to further understand their underlying genetic architecture. In this …

Background Attention-deficit/hyperactivity disorder (ADHD) can be viewed as the extreme
end of traits in the general population. Epidemiological and twin studies suggest that ADHD …