1 National Collaborating Centre for Mental Health, London, UK; Sheffield Health and Social Care NHS Foundation Trust, Sheffield, UK. Electronic address: tim.kendall@shsc.nhs.uk.
2 Nottinghamshire Healthcare NHS Trust, Nottingham, UK; University of Nottingham, Nottingham, UK.
3 Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
4 Department of Psychiatry and Behavioral Sciences, McGovern School of Medicine, University of Texas HSC at Houston, Houston, TX, USA.
5 Lancaster University, Bailrigg, Lancaster, UK.
6 Department of Care Innovation, Trimbos Institute, Utrecht, Netherlands.
7 Centre for Clinical Practice, the National Institute for Health and Care Excellence, London.