1. Institute for Experimental Medical Research; Oslo University Hospital and University of Oslo; Oslo Norway
2. Department of Circulation and Medical Imaging; Faculty of Medicine; Norwegian University of Science and Technology; Trondheim Norway
3. The Norwegian Air Ambulance Foundation; Drøbak Norway
4. St. Olav University Hospital; Trondheim Norway
5. The National Competence Center for Emergency Medicine; Oslo University Hospital; Oslo Norway