1. Department of Psychiatry, University College London Medical School, Wolfson Building, Middlesex Hospital, Riding House Street, London W1N 8AA, The National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK
2. Department of Psychiatry, University College London Medical School, Wolfson Building, Middlesex Hospital, Riding House Street, London W1N 8AA
3. Department of Psychiatry, Charing Cross and Westminster Medical School, St. Dunstan's Road, London W6 8RP