1. Warwick Clinical Trials Unit, University of Warwick, Coventry, UK
2. Southmead Hospital, North Bristol NHS Trust, Southmead Road, Westbury-on-Trym, Bristol, UK
3. Yorkshire Ambulance Service NHS Trust, Springhill 2, Brindley Way, Wakefield 41 Business Park, Wakefield, UK
4. Public Health England, South Regional Office, 2 Rivergate, Temple Quay, Bristol, UK
5. London Ambulance Service NHS Trust, Manna Ash House, 8-20 Pocock Street, London, UK
6. South Western Ambulance Service NHS Foundation Trust, Abbey Court, Eagle Way, Exeter, UK
7. South Central Ambulance Service NHS Trust, Bracknell Ambulance Station, Old Bracknell Lane West, Bracknell, Berkshire, UK
8. East Midlands Ambulance Service NHS Trust, Cross O'Cliff Court, Bracebridge Heath, Lincoln, UK
9. West Midlands Ambulance Service NHS Foundation Trust, Millenium Point, Waterfront Business Park, Waterfront Way, Brierley Hill, West Midlands, UK
10. Heartlands Hospital, Heart of England NHS Foundation Trust, Bordesley Green East, Birmingham, UK