1. FESC, Department of Cardiology; St Anna Klinik; St Anna Strasse 32, CH-6006 Luzern Switzerland
2. Division of Geriatrics, Department of General Internal Medicine; Inselspital, Bern University Hospital and University of Bern; Bern Switzerland
3. Inovise Medical, Inc.; Portland OR USA
4. Department of Heart Surgery; Luzerner Kantonsspital; Luzern Switzerland