1. James Cook University Hospital, Middlesbrough
TS4 3BW, UK.
2. Trauma Audit Research Network, University
of Manchester, Salford Royal Hospital, Salford,
UK and Centre for Urgent and Emergency Care Research and (CURE), School
of Health and Related Research and University of Sheffield,
UK.
3. University of Manchester, Hope
Hospital, Salford, UK.
4. University of York Seebohm Rowntree Building, York, YO10
5DD, UK.