1. Department of Geriatrics Bern University Hospital, University of Bern Bern Switzerland
2. Epidemiology, Biostatistics and Prevention Institute University of Zurich Zurich Switzerland
3. Department of Cardiology Swiss Cardiovascular Center Bern, Bern University Hospital, University of Bern Bern Switzerland
4. Institute of Social and Preventive Medicine University of Bern Bern Switzerland
5. Department of Cardiovascular Surgery Bern University Hospital, University of Bern Bern Switzerland