1. Tyrer, Department of Psychological Medicine, Imperial College (Charing Cross Campus), ClaybrookCentre, London, UK.
2. Central North West London Mental Health NHS Trust, Paterson Centre, London, UK. Ms Bharti Rao, Department of Psychological Medicine, Imperial College (Charing Cross Campus), Claybrook Centre, London, UK.
3. Department of Psychological Medicine, Imperial College(Charing Cross Campus), Claybrook Centre, London, UK.
4. Department of Psychological Medicine, Imperial College (Charing Cross Campus), Claybrook Centre, London, UK.
5. Department of Public Health & Policy, London School of Hygiene & Tropical Medicine, London, UK. John Green