My work focuses on individual differences in behavior, health and disease. I am mostly interested in psychopathological traits, and their often comorbid manifestation. In my work I have used twin and family designs, and genetic data to investigate the influences of genetic and environmental variation on trait variation. In 2022, I co-founded Genetics Network Amsterdam, that enables collaboration and knowledge exchange in the Amsterdam area. Since 2020, I work in child and adolescent psychiatry. Here, I investigate the causes, consequences and impact of disorders and treatment effects, as project leader of a large national collaboration between 4 academic clinical centers, called DREAMS. In addition, I lead the genetic research line of The Netherlands Autism Register.