1 Centre for Suicide Research, Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK; Oxford Health NHS Foundation Trust, Oxford, UK. Electronic address: keith.hawton@psych.ox.ac.uk.
2 Oxford Health NHS Foundation Trust, Oxford, UK.
3 Division of Psychiatry, University College London, London, UK.
4 Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, Milwaukee, WI, USA.