Kamaldeep Bhui1, Adrian James2, Simon Wessely3. 1. Centre for Psychiatry, Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, London, UK k.s.bhui@qmul.ac.uk. 2. Royal College of Psychiatrists, London, UK. 3. King's Centre for Military Studies, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, UK.