1. University of Newcastle upon Tyne; School of Neurology, Neurobiology and Psychiatry; Queen Victoria Road Newcastle upon Tyne UK NE1 4LP
2. Leazes Wing, The Royal Victoria Infirmary; Department of Psychiatry; Richardson Road Newcastle upon Tyne UK NE1 4LP
3. Institute of Psychiatry, King's College London; Centre for Affective Disorders; PO72, De Crespigny Park Denmark Hill London UK SE5 8AF
4. University of Newcastle upon Tyne; Department of Psychiatry; Queen Victoria Road Newcastle upon Tyne UK NE1 4LP