1. Division of Psychiatry, UCL (University College London), London, United Kingdom2Camden and Islington National Health Service Foundation Trust, London, United Kingdom
2. Division of Psychiatry, UCL (University College London), London, United Kingdom3Research Department of Primary Care and Population Health, UCL, London, United Kingdom
3. Department of Statistical Science, UCL, London, United Kingdom
4. Human Development and Health Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
5. Rethink Mental Illness, London, United Kingdom
6. Research Department of Primary Care and Population Health, UCL, London, United Kingdom