1. Department of Psychiatry, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
2. Ipse de Bruggen, Centre for People with Intellectual Disability, Zwammerdam, The Netherlands.
3. Department of Nuclear Medicine, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
4. Department of Genetic Metabolic Disorders, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
5. Neurogenetics Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.
6. Arkin Mental Health Care, Amsterdam, The Netherlands.