[1] Acad Teaching Hosp Feldkirch, Vorarlberg Inst Vasc Invest & Treatment, A-6807 Feldkirch, Austria
[2] Acad Teaching Hosp Feldkirch, Dept Med & Cardiol, Carinagasse 47, A-6807 Feldkirch, Austria
[3] Private Univ Principal Liechtenstein, Triesen, Liechtenstein
[4] Drexel Univ, Coll Med, Philadelphia, PA 19104 USA
[5] Med Cent Labs, Feldkirch, Austria