1. Centre for Social, Genetic and Developmental Psychiatry and Department of Psychology, City University, London, UK
2. Department of Psychology, Institute of Psychiatry, London, UK
3. Department of Psychological Medicine, Institute of Psychiatry, London, UK
4. Department of Biochemistry, St Thomas’s Hospital, London, UK
5. Department of Psychology, City University, London, UK
6. Clinical Neuroscience Research Centre, Dartford, UK