1. Centre for Outcomes Research and Effectiveness (CORE) Research Department of Clinical, Educational & Health Psychology University College London London UK
2. iCope – Camden & Islington Psychological Therapies Services – Camden & Islington NHS Foundation Trust London UK
3. Department of Psychiatry University of California Los Angeles Los Angeles CA USA
4. Statistical Science University College London London UK
5. Department of Health Sciences University of York York UK
6. Department of Psychology Vanderbilt University Nashville TN USA
7. Primary Care, Population Sciences and Medical Education Faculty of Medicine University of Southampton Southampton UK
8. Department of Psychology University of Exeter Exeter UK
9. Centre for Academic Mental Health Population Health Sciences, Bristol Medical School University of Bristol Bristol UK
10. Centre for Academic Primary Care Department of Population Health Science Bristol Medical School University of Bristol Bristol UK
11. Division of Psychiatry University College London London UK
12. MRC Clinical Trials Unit at UCL London UK
13. Camden & Islington NHS Foundation Trust St Pancras Hospital London UK