1. Department of Neuroscience, University of Uppsala, Uppsala, Sweden
2. Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
3. Department of Psychiatry, Lausanne University Hospital, Prilly, Switzerland
4. Genetic Epidemiology Research Branch, Intramural Research Program, National Institute of Mental Health, Bethesda, MD, USA
5. Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden