1. Department AISAB, Ambulance Medical Service in Stockholm [Ambulanssjukvården i Storstockholm AB], Stockholm, Sweden
2. Department of Clinical Science and Education, Karolinska Institute, Stockholm, Sweden
3. Emergency Department, Karolinska University Hospital, Stockholm, Sweden
4. Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
5. Department of Emergency Medicine, Södersjukhuset, Stockholm, Sweden