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