1. The Norwegian Air Ambulance Foundation Drøbak Norway
2. London's Air Ambulance Barts Health Trust London UK
3. Field of Pre‐hospital Critical Care University of Stavanger Stavanger Norway
4. Department of Anaesthesiology and Intensive Care Sørlandet Hospital Kristiansand Norway
5. Department of Anaesthesia and Intensive Care Medicine Landspitali University Hospital Reykjavik Iceland
6. Centre for Pre‐hospital Emergency Care Kuopio University Hospital Kuopio Finland
7. Department of Pre‐hospital Care and Disaster Medicine Region of Skåne Lund Sweden
8. Pre‐hospital Critical Care Service Aarhus University Hospital Aarhus Denmark
9. The Danish Air Ambulance Aarhus Denmark
10. Norwegian Institute of Public Health Oslo Norway
11. University College of Southeast Norway Notodden Norway
12. Air Ambulance Department Oslo University Hospital Oslo Norway
13. University of Oslo Oslo Norway