1. Institute of Pharmacology, University Bern, Bern, Switzerland
2. Division of General Internal Medicine, Bern University Hospital, Bern, Switzerland
3. Division of Vascular Medicine, Swiss Cardiovascular Center, Bern University Hospital, Bern, Switzerland
4. Department of Internal Medicine, Cantonal Hospital Baden, Baden, Switzerland
5. Clinic of Angiology, University Hospital Lausanne, Lausanne, Switzerland
6. Department of Internal Medicine, University Hospital Basel, Basel, Switzerland
7. Department of Internal Medicine, Cantonal Hospital Lucerne, Lucerne, Switzerland
8. Department of Internal Medicine, Cantonal Hospital Fribourg, Fribourg, Switzerland
9. Department of Internal Medicine, Cantonal Hospital Obwalden, Sarnen, Switzerland
10. Department of Internal Medicine, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
11. Department of Internal Medicine, Regional Hospital Burgdorf, Burgdorf, Switzerland
12. Clinic of Angiology, University Hospital Zurich, Zurich, Switzerland
13. Department of Internal Medicine, Cantonal Hospital Frauenfeld, Frauenfeld, Switzerland