1. Heart, Vascular and Neuro Theme, Department of Cardiology, Norrbacka S3:00, Karolinska University Hospital , 171 76 Stockholm , Sweden
2. Ambulance Medical Service in Stockholm [Ambulanssjukvården i Storstockholm AB], AISAB [Ambulanssjukvården i Storstockholm AB] , Sundbyberg , Sweden
3. Academic EMS , Stockholm , Sweden
4. Department of Medicine Solna, Karolinska Institutet , Stockholm , Sweden
5. Sophiahemmet University , Stockholm , Sweden
6. Department for Health Promoting Science, Sophiahemmet University , Stockholm , Sweden
7. Division of Nursing, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet , Stockholm , Sweden