1. Division of Cardiology, Department of Clinical Science and Education, Karolinska Institutet, Södersjukhuset, Sjukhusbacken 10, Stockholm, Sweden
2. Cardiology, Department of Medical Sciences, Uppsala University, Akademiska sjukhuset, Entrance 40, floor 5, Uppsala, Sweden
3. Cardiology, Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Mörbygårdsvägen 5, Stockholm, Sweden
4. Uppsala Clinical Research Center, Uppsala University, Dag Hammarskjölds väg 38, Uppsala, Sweden
5. Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
6. Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
7. Department of Health Sciences, University of Borås, Borås, Sweden
8. Department of Cardiology, Linköping University Hospital, Linköping, Sweden
9. Department of Medical and Health Sciences, Linköping University, Sandbäcksgatan 7, Linköping, Sweden
10. Department of Cardiology, Örebro University Hospital, Örebro, Sweden
11. Division of Cardiology, Department of Internal Medicine, Ryhov Hospital, Sjukhusgatan, Jönköping, Sweden
12. Department of Medicine, Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
13. Department of Cardiology, Karolinska University Hospital, Stockholm, Sweden
14. Centre for Resuscitation Science, Karolinska Institutet, Södersjukhuset, Jägargatan 20, Stockholm, Sweden