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, , Sheffield S1 4DA , UK
4. The University of Sheffield , ScHARR, , Sheffield S1 4DA , UK
5. College of Life Sciences , George Davies Centre, , Leicester LE1 7HA , UK
6. University of Leicester , George Davies Centre, , Leicester LE1 7HA , UK
7. 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
8. St Pancras Rehabilitation Unit , Central and North West London NHS Foundation Trust, , South Wing 4 St Pancras Way, London NW1 0PE , UK
9. St Pancras Hospital , Central and North West London NHS Foundation Trust, , South Wing 4 St Pancras Way, London NW1 0PE , UK