1. Population Health Sciences, Bristol Medical School; University of Bristol; Bristol UK
2. NIHR CLAHRC West; Bristol UK
3. School of Clinical Sciences, Bristol Medical School; University of Bristol; Bristol UK
4. Avon & Wiltshire Mental Health Partnership NHS Trust; Chippenham UK
5. Department of Psychiatry; University of Cambridge; Cambridge UK
6. Lancashire Care NHS Trust; Preston UK
7. Mental Health and Wellbeing, Warwick Medical School; University of Warwick
8. School of Psychology; University of Sussex; Brighton UK
9. Division of Psychiatry; University College London; London UK
10. Camden and Islington NHS Foundation Trust; London UK
11. King's College London, Social, Genetic & Developmental Psychiatry Centre; Institute of Psychiatry, Psychology & Neuroscience; London UK
12. EQUIP, Hackney, East London NHS Foundation Trust; London UK
13. Herefordshire Early Intervention Service; 2gether NHS Foundation Trust; Gloucester UK
14. Kensington, Chelsea, Westminster and Brent Early Intervention Service; Central & North West London NHS Foundation Trust; London UK
15. Lewisham Early Intervention Service; South London and Maudsley NHS Foundation Trust; London UK
16. Wandsworth Early Intervention Service; South West London & St Georges' Mental Health NHS Trust; London UK
17. STEP, Southwark, South London and Maudsley NHS Foundation Trust; London UK