1. Division of Cardiology Geneva University Hospitals Geneva Switzerland
2. AMIS Plus Data Center Epidemiology, Biostatistics and Prevention Institute University of Zurich Zurich Switzerland
3. Department of Cardiology Kantonsspital St. Gallen St. Gallen Switzerland
4. Department of Cardiology Cardiocentro Ticino Lugano Switzerland
5. Department of Biomedicine University of Basel Basel Switzerland
6. Department of Cardiology Centre Hospitalier Universitaire Vaudois Lausanne Switzerland
7. Division of Cardiology Triemli Hospital Zurich Switzerland