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Rebecca Gathercole, Rosie Bradley, Emma Harper, Lucy Davies, Lynn Pank, Natalie Lam, Anna Davies, Emma Talbot, Emma Hooper, Rachel Winson, Bethany Scutt, Victoria Ordonez Montano, Samantha Nunn, Grace Lavelle, Matthew Lariviere, Shashivadan Hirani, Stefano Brini, Andrew Bateman, Peter Bentham, Alistair Burns, Barbara Dunk, Kirsty Forsyth, Chris Fox, Catherine Henderson, Martin Knapp, Iracema Leroi, Stanton Newman, John O’Brien, Fiona Poland, John Woolham, Richard Gray & Robert Howard.

Rebecca Gathercole ^1,*, Rosie Bradley ², Emma Harper ², Lucy Davies ², Lynn Pank ², Natalie Lam ², Anna Davies ^3,4, Emma Talbot ⁵, Emma Hooper ^6,7, Rachel Winson ⁸, Bethany Scutt ¹, Victoria Ordonez Montano ⁹, Samantha Nunn ¹⁰, Grace Lavelle ¹, Matthew Lariviere ¹¹, Shashivadan Hirani ³, Stefano Brini ³, Andrew Bateman ¹², Peter Bentham ¹³, Alistair Burns ⁷, Barbara Dunk ¹⁴, Kirsty Forsyth ¹⁵, Chris Fox ¹⁶, Catherine Henderson ¹⁷, Martin Knapp ¹⁷, Iracema Leroi ¹⁸, Stanton Newman ³, John O’Brien ¹⁹, Fiona Poland ²⁰, John Woolham ²¹, Richard Gray ², Robert Howard ²²

¹ Department of Old Age Psychiatry, King’s College London, London, UK
² Medical Research Council Population Health Research Unit, University of Oxford, Oxford, UK
³ School of Health Sciences, City, University of London, London, UK
⁴ Population Health Sciences, University of Bristol, Bristol, UK
⁵ Norfolk and Suffolk NHS Foundation Trust, Stowmarket, UK
⁶ Lancashire Care NHS Foundation Trust, Preston, UK
⁷ Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
⁸ Cambridgeshire and Peterborough NHS Foundation Trust, Cambridge, UK
⁹ Hertfordshire Community NHS Trust, Watford, UK
¹⁰ Cambridgeshire Community Services NHS Trust, Cambridge, UK
¹¹ Centre for International Research on Care, Labour and Equalities, University of Sheffield, Sheffield, UK
¹² School of Health and Social Care, University of Essex, Colchester, UK
¹³ Birmingham and Solihull Mental Health NHS Foundation Trust, Birmingham, UK
¹⁴ South London and Maudsley NHS Foundation Trust, London, UK
¹⁵ School of Health Sciences, Queen Margaret University, Edinburgh, UK
¹⁶ Norwich Medical School, University of East Anglia, Norwich, UK
¹⁷ Care Policy and Evaluation Centre, London School of Economics and Political Science, London, UK
¹⁸ Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland
¹⁹ Department of Psychiatry, University of Cambridge, Cambridge, UK
²⁰ School of Health Sciences, University of East Anglia, Norwich, UK
²¹ National Institute for Health Research (NIHR) Health & Social Care Workforce Research Unit, King’s College London, London, UK
²² Division of Psychiatry, University College London, London, UK
^* Corresponding author Email: rebecca.gathercole@kcl.ac.uk

Declared competing interests of authors: Samantha Nunn reports that a National Institute for Health Research (NIHR) Health Technology Assessment (HTA) programme grant was awarded to King’s College London, and that study activity at Cambridgeshire Community Services NHS Trust was funded by this grant. Peter Bentham reports personal fees from TauRx Therapeutics Ltd (Aberdeen, UK) outside the submitted work. Catherine Henderson reports grants from the NIHR HTA programme during the conduct of the study. John O’Brien reports personal fees from TauRx Therapeutics Ltd, AXON Neuroscience SE (Larnaca, Cyprus), GE Healthcare (Chicago, IL, USA) and Eisai Co., Ltd (Tokyo, Japan), grants and personal fees from Avid Radiopharmaceuticals (Eli Lilly and Company, Indianapolis, IN, USA) and grants from Alliance Medical (Warwick, UK) outside the submitted work. Richard Gray reports grants from the NIHR HTA programme during the conduct of the study. Robert Howard reports grants from the NIHR HTA programme during the conduct of the study. He also reports that he was a member of the HTA programme Commissioning Sub-board (Expressions of Interest) (2009–11) and of the HTA Programme Commissioning Committee (2013–18).