Peter Tyrer is Professor of Community Psychiatry and Head of Department of Psychological Medicine, Imperial College Faculty of Medicine and has a specialist interest in Personality Disorders. In addition to his clinical and academic work he lectures widely in Europe and has run clinical trials on the use of benzodiazepines in depression with particular attention to patients with personality disorders. He is currently Editor of the "British Journal of Psychiatry," the most prestigious psychiatry journal in Europe.

Derek Steinberg is now retired after a career as a consultant psychiatrist in the NHS.