1. Department of Medicine, Center for Resuscitation Science, Karolinska Institutet, Solna, Sweden
2. Section of Cardiology, Stockholm South General Hospital, Stockholm, Sweden
3. Centre for Pre‐Hospital Research in Western Sweden, University of Borås, Borås, Sweden
4. Institute of Medicine, Center for Cardiovascular and Metabolic Research, Sahlgrenska University Hospital, Göteborg, Sweden
5. Fire and Rescue Service Dala Middle, Falun, Sweden
6. Emergency Medical Services, Skövde Emergency Department, Skövde, Sweden
7. Emergency Medical Services, Sahlgrenska University Hospital, Göteborg, Sweden
8. Värnamo County Hospital, Jönköping County, Sweden
9. SOS Alarm Centers, Stockholm, Sweden
10. Department of Clinical Sciences, Karolinska Institutet, Solna, Sweden
11. Section of Cardiology, Danderyd Hospital, Danderyd, Sweden