There are substantial differences, or variation, between humans in aggression, with its
molecular genetic basis mostly unknown. This review summarizes knowledge on the genetic …

This review offers an update on research conducted with FinnTwin12 (FT12), the youngest
of the three Finnish Twin Cohorts. FT12 was designed as a two-stage study. In the first stage …

The Netherlands Twin Register (NTR) is a national register in which twins, multiples and
their parents, siblings, spouses and other family members participate. Here we describe the …

Importance Little is known about the long-term economic and social outcomes for children
with longitudinally assessed comorbid externalizing and internalizing symptoms, especially …

Monozygotic (MZ) twins and higher-order multiples arise when a zygote splits during pre-
implantation stages of development. The mechanisms underpinning this event have …

Objective To investigate the genetic architecture of internalizing symptoms in childhood and
adolescence. Method In 22 cohorts, multiple univariate genome-wide association studies …

Childhood aggressive behavior (AGG) has a substantial heritability of around 50%. Here we
present a genome-wide association meta-analysis (GWAMA) of childhood AGG, in which all …

Background To conduct a comprehensive assessment of the association between
aggression and academic performance in compulsory education. Method We studied …

Depression is a heterogeneous mental health problem affecting millions worldwide, but a
majority of individuals with depression do not experience relief from initial treatments …

The societal implication of sex and gender (SG) differences in brain are profound, as they
influence brain development, behavior, and importantly, the presentation, prevalence, and …