[1] Med Univ Graz, Clin Dept Cardiol, Graz, Austria
[2] Med Univ Innsbruck, Dept Cardiol, Innsbruck, Austria
[3] Klinikum Wels Grieskirchen, Dept Cardiol, Wels, Austria
[4] Ordensklinikum Linz Elisabethinen, Dept Internal Med, Linz, Austria
[5] AKH Wien, Dept Cardiol, Vienna, Austria
[6] Kepler Univ Hosp Linz, Dept Cardiol, Linz, Austria
[7] Acad Teaching Hosp Feldkirch, Dept Internal Med, Feldkirch, Austria
[8] Klin Favoriten, Dept Internal Med, Vienna, Austria
[9] Ordensklinikum Linz Elisabethinen, Dept Nucl Med, Linz, Austria