1. UCLA Center for Neurobehavioral Genetics; Semel Institute for Neuroscience and Human Behavior; University of California Los Angeles; California
2. Brain Center Rudolf Magnus; Department of Psychiatry; University Medical Center Utrecht; The Netherlands
3. Department of Medical Genetics; University Medical Centre Utrecht; The Netherlands
4. Radboud University Nijmegen Medical Centre; Donders Institute for Brain; Cognition and Behavior; Department of Cognitive Neuroscience &Department of Human Genetics,; Nijmegen The Netherlands
5. Karakter; Radboud University Nijmegen Medical Center; Nijmegen The Netherlands
6. Department of Clinical Chemistry and Haematology; Division of Laboratories and Pharmacy; University Medical Center Utrecht; Utrecht The Netherlands
7. Julius Centre for Health Sciences and Primary Care; University Medical Centre Utrecht; The Netherlands