1. Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden.
2. Center for Intensive Internal Medicine, Ljubljana, Slovenia.
3. Department of Cardiology, Medical University of Vienna, Vienna, Austria.
4. Department of Emergency Medicine, Medical University of Vienna, Vienna, Austria.
5. Department of Cardiology, Nykoebing F Hospital, Nykoebing F, Denmark.
6. Cardiology Unit, Department of Medicine, Karolinska University Hospital, Stockholm, Sweden.
7. Department of Cardiology, University Hospital for Internal Medicine, Innsbruck, Austria.
8. Department of Medical Sciences, Cardiology and Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden.
9. Department of Cardiology, Aarhus University Hospital Skejby, Aarhus, Denmark.
10. Department of Cardiology, Sahlgrenska University, Gothenburg, Sweden.
11. Department of Clinical Physiology, Lund University, Lund, Sweden.
12. Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden.
13. Philips Healthcare, San Diego, California.