Prof Lockey: Consultant in Emergency Medicine, Calderdale and Huddersfield NHS Trust, United Kingdom and Visiting Professor of Emergency Medicine, University of Huddersfield, United Kingdom. Dr. Bland: Senior Lecturer in Adult Nursing, University of Huddersfield, United Kingdom. Dr. Stephenson: Senior Lecturer in Health/Biomedical Statistics, University of Huddersfield, United Kingdom. Dr. Bray: Associate Professor and Heart Foundation Fellow, Monash University, Melbourne, Australia and Adjunct Associate Professor, Curtin University, Perth, Australia. Prof Astin: Professor of Nursing, University of Huddersfield, United Kingdom and Professor of Nursing, Calderdale and Huddersfield NHS Trust, United Kingdom.

Correspondence: Andrew Lockey, PhD, Emergency Department, Calderdale Royal Hospital, Salterhebble, Halifax HX3 0PW, United Kingdom; e-mail: [email protected]

J. Bray is funded by a National Heart Foundation of Australia Fellowship. The authors alone are responsible for the content and writing of this article. The remaining authors declare no conflict of interest.

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