1. Division of Cardiology, University Heart Centre Graz, Medical University of Graz , Auenbruggerplatz 15, A-8036 Graz , Austria
2. National Heart and Lung Institute, Imperial College London, Hammersmith Campus , Du Cane Road, W12 0NN London , UK
3. Department of Internal Medicine I / Comprehensive Heart Failure Centre, University Hospital Würzburg , Am Schwarzenberg 15, 97078 Würzburg , Germany
4. Kantonsspital St. Gallen , Rorschacherstrasse 959007, St. Gallen , Switzerland
5. University Heart Center, University Hospital Zurich and University of Zurich , Rämistrasse 1008091, Zurich , Switzerland
6. BioTechMed Graz , Mozartgasse 12/II, A-8010 Graz , Austria