1. Karolinska Institutet , Department of Clinical Science and Education, Södersjukhuset and Section of Emergency Medicine, Södersjukhuset , Stockholm , Sweden
2. Intensive Care Unit , Karolinska University Hospital , Solna , Sweden
3. Karolinska Institutet , Department of Neurobiology, Care Sciences and Society, Division of Nursing , Stockholm , Sweden
4. Department of Emergency Medicine and Services , Helsinki University Hospital and University of Helsinki , Helsinki , Finland
5. Academic EMS , Stockholm , Sweden
6. Karolinska Institutet , Department of Clinical Science and Education, Södersjukhuset , Stockholm , Sweden
7. Department of Anaesthesia and Intensive Care Medicine , University of Helsinki and Helsinki University Hospital , Helsinki , Finland