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Gavin D Perkins, Claire A Hawkes, Karin Eli, James Griffin, Claire Jacques, Caroline J Huxley, Keith Couper, Cynthia Ochieng, Jonathan Fuld, Zoe Fritz, Rob George, Doug Gould, Richard Lilford, Martin Underwood, Catherine Baldock, Chris Bassford, Peter-Marc Fortune, John Speakman, Anna Wilkinson, Bob Ewings, Jane Warwick, Frances Griffiths & Anne-Marie Slowther.

Gavin D Perkins ^1,2,*, Claire A Hawkes ¹, Karin Eli ³, James Griffin ¹, Claire Jacques ¹, Caroline J Huxley ³, Keith Couper ^1,2, Cynthia Ochieng ⁴, Jonathan Fuld ⁵, Zoe Fritz ⁵, Rob George ⁶, Doug Gould ⁷, Richard Lilford ³, Martin Underwood ¹, Catherine Baldock ⁸, Chris Bassford ⁸, Peter-Marc Fortune ⁹, John Speakman ², Anna Wilkinson ¹⁰, Bob Ewings ^1,11, Jane Warwick ¹, Frances Griffiths ³, Anne-Marie Slowther ³

¹ Warwick Clinical Trials Unit, University of Warwick, Coventry, UK
² University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
³ Warwick Medical School, University of Warwick, Coventry, UK
⁴ University of Bristol, Bristol, UK
⁵ Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
⁶ St Christopher’s Hospice, London, UK
⁷ Intensive Care National Audit & Research Centre, London, UK
⁸ University Hospitals of Coventry and Warwickshire NHS Trust, Coventry, UK
⁹ Manchester University NHS Foundation Trust, Manchester, UK
¹⁰ Hampshire Hospitals NHS Foundation Trust, Hampshire, UK
¹¹ Patient and public contributor, ,
^* Corresponding author Email: G.D.Perkins@warwick.ac.uk

Declared competing interests of authors: Gavin D Perkins reports grants from the National Institute for Health and Care Research (NIHR), during the conduct of the study; was an executive committee member of Resuscitation Council UK (London, UK) (2009 to present) and Recommended Summary Plans for Emergency Care and Treatment (ReSPECT) committee member of the Resuscitation Council UK (2015 to present); was a board member of the NIHR Programme Grants for Applied Research (2016–20), Health Technology Assessment (HTA) (2020 to present) and CTU Standing Advisory Committee (2019 to present); and is a NIHR senior investigator. Karin Eli reports grants from NIHR, during the conduct of the study. Keith Couper reports grants from NIHR, during the conduct of the study, and grants from the Resuscitation Council UK, outside the submitted work. Zoe Fritz chairs the ReSPECT subcommittee for the Resuscitation Council UK and sits on the executive committee for the Resuscitation Council UK. Martin Underwood reports grants from NIHR during the conduct of the study; personal fees from NIHR for acting as journal editor and member of the Journal Editors Group, grants from NIHR for being chief investigator and co-investigator on multiple research grants, grants from Versus Arthritis (Chesterfield, UK); other from multiple professional conferences, grants from Stryker Ltd (Newbury, UK), grants from Serco Group plc (Hook, UK), other from Confederation for Advanced Research Training in Africa (Nairobi, Kenya) and personal fees from Clinvivo Ltd (Kent, UK), outside the submitted work; is an associate investigator on multiple research grants from the Australian National Health and Medical Research Council (Canberra, ACT, Australia); and was part of the NIHR Journals Library Editors Group (2016–19) and of the HTA Commissioning Committee (2010–14). Catherine Baldock was the clinical lead for ReSPECT implementation at the Resuscitation Council UK. Bob Ewings received funding from the study for his PPI work and was also a member of the ReSPECT National Working Group. Jane Warwick reported grants from NIHR, during the conduct of the study. Frances Griffiths reported grants from NIHR, during the conduct of the study. Anne-Marie Slowther reports grants from the NIHR Health and Social Care Delivery Research programme (references 13/10/14 and 17//99/34) and the HTA programme (reference 16/77/02), outside the submitted work; and was co-author on an evidence synthesis of the do not attempt cardiopulmonary resuscitation decision-making that informed the development of the ReSPECT process.