1. Department of Cardiology, Bern University Hospital, Bern, Switzerland
2. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
3. Department of Clinical Research, Clinical Trials Unit, Bern, Switzerland
4. Department of Neurology, Bern University Hospital, Bern, Switzerland
5. Department of Medicine/Cardiology, University of Colorado Denver, Aurora, CO, USA
6. Cardiovascular Centre Frankfurt, Frankfurt am Main, Frankfurt, Germany