1. Division of Psychiatry; University College London; UK
2. Department of Old Age Psychiatry; Kings College London; UK
3. South London and Maudsley NHS Foundation Trust; London UK
4. Division of Imaging Sciences; St Thomas Hospital; London UK
5. University of Alabama; Birmingham AL USA
6. UMR 1137 IAME INSERM University Paris 7, France and Genetics Institute; University College London; UK