1 Emergency Department, St Vincent's University Hospital, Dublin, Ireland.
2 School of Medicine, University College Dublin, Dublin, Ireland.
3 Centre for Urgent and Emergency Care Research, ScHARR, The University of Sheffield, Sheffield S1 4DA, UK.
4 College of Life Sciences, George Davies Centre, University of Leicester, Leicester LE1 7HA, UK.
5 MRC Unit for Lifelong Health and Ageing at UCL, University of Leicester College of Life Sciences, 5th Floor, 1-19 Torrington Place, London WC1E 7HB, UK.
6 St Pancras Rehabilitation Unit, Central and North West London NHS Foundation Trust, St Pancras Hospital, South Wing 4 St Pancras Way, London NW1 0PE, UK.