[1] Univ Hosp, Dept Cardiol, Geneva, Switzerland
[2] La Tour Hosp, Cardiovasc Dept, Geneva, Switzerland
[3] Univ Zurich, Inst Social & Prevent Med, CH-8006 Zurich, Switzerland
[4] Kantonsspital, Dept Cardiol, Luzern, Switzerland
[5] Stadtspital Triemli, Dept Cardiol, Zurich, Switzerland
[6] CHU Vaudois, Dept Cardiol, CH-1011 Lausanne, Switzerland