Tinca Polderman (Vrije Universiteit Amsterdam, Complex Trait Genetics, Center for Neuroscience and Cognitive Research), Philip Jansen (Vrije Universiteit Amsterdam, Complex Trait Genetics, Center for Neuroscience and Cognitive Research; Department of Child and Adolescent Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands), Jorim Tielbeek (Vrije Universiteit Amsterdam, Complex Trait Genetics, Center for Neuroscience and Cognitive Research; Department Child and Adolescent Psychiatry, VU University Medical Center Amsterdam, The Netherlands), Henning Tiemeier (Vrije Universiteit Amsterdam, Complex Trait Genetics, Center for Neuroscience and Cognitive Research; Department of Child and Adolescent Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands), Hadi Zafarmand (Universiteit van Amsterdam, Amsterdam Medical Center, Dept. Public Health), Tanja Vrijkotte (Universiteit van Amsterdam, Amsterdam Medical Center, Dept. Public Health)