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Gail Mountain, Jessica Wright, Cindy L Cooper, Ellen Lee, Kirsty Sprange, Jules Beresford-Dent, Tracey Young, Stephen Walters, Katherine Berry, Tom Dening, Amanda Loban, Emily Turton, Benjamin D Thomas, Emma L Young, Benjamin J Thompson, Bethany Crawford, Claire Craig, Peter Bowie, Esme Moniz-Cook & Alexis Foster.

Gail Mountain ¹, Jessica Wright ², Cindy L Cooper ^2,*, Ellen Lee ², Kirsty Sprange ³, Jules Beresford-Dent ¹, Tracey Young ⁴, Stephen Walters ⁴, Katherine Berry ⁵, Tom Dening ⁶, Amanda Loban ², Emily Turton ², Benjamin D Thomas ², Emma L Young ², Benjamin J Thompson ², Bethany Crawford ⁶, Claire Craig ⁷, Peter Bowie ⁸, Esme Moniz-Cook ⁹, Alexis Foster ⁴

¹ Centre for Applied Dementia Studies, University of Bradford, Bradford, UK
² Sheffield Clinical Trials Research Unit, School of Health and Related Research, University of Sheffield, Sheffield, UK
³ Nottingham Clinical Trials Research Unit, University of Nottingham, Nottingham, UK
⁴ School of Health and Related Research, University of Sheffield, Sheffield, UK
⁵ Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
⁶ Division of Psychiatry & Applied Psychology, School of Medicine, University of Nottingham, Nottingham, UK
⁷ Art and Design Research Centre, Sheffield Hallam University, Sheffield, UK
⁸ Sheffield Health and Social Care NHS Foundation Trust, Sheffield, UK
⁹ Faculty of Health Sciences, University of Hull, Hull, UK
^* Corresponding author Email: c.l.cooper@sheffield.ac.uk

Declared competing interests of authors: Cindy L Cooper discloses membership of the National Institute for Health and Care Research Clinical Trials Unit Standing Advisory Committee (2016 to present) and the UK Clinical Research Collaboration Registered Clinical Trials Unit Network Executive Group (2015 to present). Stephen Walters reports relevant financial activities outside the submitted work, including research grants from the Department of Health and Social Care, Medical Research Council, National Institute for Health and Care Research and National Institute for Health and Care Excellence, a National Institute for Health and Care Research Senior Investigator Award, book royalties from John Wiley & Sons, Inc. (Hoboken, NJ, USA) and external examining fees.