1. Department of Surgical Sciences/Anaesthesiology and Intensive Care, Uppsala University, Uppsala, Sweden
2. Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
3. Region Skåne Prehospital Center and Skåne University Hospital, Lund, Sweden
4. Regional Ambulance Service Utrecht, Utrecht, Netherlands
5. Västerås Central Hospital, Västerås, Sweden
6. Gävle Hospital, Gävle, Sweden
7. South Western Ambulance Service NHS Foundation Trust Abbey Court, Exeter, England
8. Center of Prehospital Research in Western Sweden and the University College of Borås and Sahlgrenska University Hospital, Göteborg, Sweden