[1] Univ Zurich, Biostat & Prevent Inst, AMIS Plus Data Ctr Epidemiol, Zurich, Switzerland
[2] Univ Hosp Geneva, Dept Cardiol, Geneva, Switzerland
[3] Univ Zurich, Fac Med, Zurich, Switzerland
[4] Cardioctr Ticino, Dept Cardiol, Lugano, Switzerland
[5] Cantonal Hosp St Gallen, Dept Cardiol, St Gallen, Switzerland