1. Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland
2. Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
3. Division of Biostatistics, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
4. Division of Cardiovascular Medicine, Keck School of Medicine, University of Southern California, Los Angeles
5. Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota6Cardiac Centre, St. George’s, University of London, London, England
6. Department of Cardiology, Leiden University Medical Centre, Leiden, the Netherlands