1. IMPACT Research Centre; Northern Health & Social Care Trust; Antrim UK
2. Mental Health Foundation; London UK
3. School of Social Sciences, Education & Social Work; Queen's University Belfast; Belfast UK
4. Department of Child and Adolescent Psychiatry; Institute of Psychiatry, Psychology and Neuroscience, King's College London; London UK
5. School of Psychology; Queen's University Belfast; Belfast UK
6. Division of Psychology & Mental Health; University of Manchester; Manchester UK
7. Institute of Mental Health Sciences, School of Health Sciences; Ulster University; Newtownabbey UK
8. Praxis Care; Belfast UK
9. Mental Health Foundation; Glasgow UK
10. Mental Health and Addiction Research Group, Department of Health Sciences; University of York; York UK
11. Centre for Reviews and Dissemination; University of York; York UK
12. Cochrane Common Mental Disorders; University of York; York UK