Affiliation: | a Centre for Psychiatry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Old Anatomy Building, Charterhouse Square, London EC1M 6BQ, UK b National Centre for Social Research, London, UK c Institute of Psychiatry, Kings College London, London, UK d Department of Mental Health Sciences, University College London, London, UK e Department of Health Sciences, University of Leicester, Leicester, UK |