[1] Bern Univ Hosp, Dept Geriatr, Inselspital, Bern, Switzerland
[2] Univ Bern, Bern, Switzerland
[3] Kantonsspital Munsterlingen, Dept Internal Med, CH-8596 Munsterlingen, Switzerland
[4] Univ Svizzera Italiana, Fac Biomed Sci, Lugano, Switzerland
[5] Univ Hosp Zurich, Dept Med, Outpatient Clin, Zurich, Switzerland
[6] Luzerner Kantonsspital, Dept Cardiol, Heart Ctr, Luzern, Switzerland
[7] Univ Milano Bicocca, San Luca Hosp, Dept Cardiol, Ist Auxol Italiano, Milan, Italy
[8] Univ Milano Bicocca, Dept Med & Surg, Milan, Italy
[9] Hosp San Giovanni, Dept Cardiovasc Med, Bellinzona, Switzerland