Derrick Silove1, Philip B Ward2. 1. Psychiatry Research and Teaching Unit, School of Psychiatry, University of New South Wales, Mental Health Centre, Liverpool Hospital, Sydney, NSW 2170, Australia. Electronic address: d.silove@unsw.edu.au. 2. Schizophrenia Research Unit, School of Psychiatry, University of New South Wales, Mental Health Centre, Liverpool Hospital, Sydney, NSW 2170, Australia.