1. Department of Psychological Medicine, King's College School of Medicine and Dentistry and Institute of Psychiatry, 103 Denmark Hill, London SE5 8AZ, UK
2. Department of Psychology, University of York, Heslington, York YO1 5DD, UK
3. Applied Psychology Unit, 15 Chaucer Road, Cambridge CB2 2EF, UK
4. Neuroimaging Unit, De Crespigny Park, London SE5 8AF, UK
5. Brain Image Analysis Unit, De Crespigny Park, London SE5 8AF, UK
6. Department of Psychology, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK