[1] Vorarlberg Inst Vasc Invest & Treatment VIVIT, Feldkirch, Austria
[2] Acad Teaching Hosp Feldkirch, Dept Med 1, Feldkirch, Austria
[3] Private Univ Principal Liechtenstein, Triesen, Liechtenstein
[4] Med Cent Labs, Feldkirch, Austria
[5] Cty Hosp Bregenz, Dept Med, Bregenz, Austria
[6] Drexel Univ, Coll Med, Philadelphia, PA 19104 USA