1. Department of Psychiatry, University College London, Maple House, 149 Tottenham Ct Rd, London W1T 7BN, UK
2. Institute of Psychiatry, Psychology and Neuroscience, Kings College London, 16 De Crespigny Park, London SE5 8AF, UK
3. Oxford Institute of Clinical Psychology Training and Research, University of Oxford, Isis Education Centre, Warneford Hospital, Headington, Oxford OX3 7JX, UK
4. Institute of Epidemiology and Health, University College London, Department of Epidemiology and Public Health University College London, 1-19 Torrington Place, London WC1E 7HB, UK
5. Population Health Research Institute, St George’s University of London Cranmer Terrace, London SW17 0RE, UK
6. Clinical Research Unit, South West London and St George’s Mental Health Trust, Trinity Building, Springfield University Hospital, 15 Springfield Drive, London SW17 0YF, UK
7. Early Years Programme, Anna Freud National Centre for Children and Families, Anna Freud Centre, 4-8 Rodney Street, London N1 9JH, UK
8. School of Health and Psychological Sciences City, University of London, Northampton Square, London EC1V 0HB, UK
9. Florence Nightingale, Faculty of Nursing, Midwifery and Palliative Care, Kings College London, James Clerk Maxwell Building, 57 Waterloo Road, London SE1 8WA, UK