1. Centre for Outcomes Research and Effectiveness (CORE), Research Department of Clinical, Educational & Health Psychology, University College London, London, United Kingdom
2. iCope Camden & Islington NHS Foundation Trust, St Pancras Hospital, London, United Kingdom
3. Department of Psychiatry, University of California, Los Angeles
4. Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, United Kingdom
5. Department of Psychology, Vanderbilt University, Nashville, Tennessee
6. Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
7. Statistical Science, University College London, London, United Kingdom
8. Department of Psychology, University of Exeter, Exeter, United Kingdom
9. Department of Health Sciences, University of York, York, United Kingdom
10. Centre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
11. Centre for Academic Primary Care, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
12. Institute of Health Research, University of Exeter College of Medicine and Health, Exeter, United Kingdom
13. Department of Health and Caring Sciences, Western Norway University of Applied Sciences, Bergen, Norway
14. University of Pennsylvania College of Arts and Sciences, Department of Psychology, Philadelphia
15. Division of Psychiatry, University College London, London, United Kingdom
16. Camden & Islington NHS Foundation Trust, London, United Kingdom