[1] Private Univ Principal Liechtenstein, Med Sci, Triesen, Liechtenstein
[2] Acad Teaching Hosp Feldkirch, Vorarlberg Inst Vasc Invest & Treatment VIVI, Feldkirch, Austria
[3] Acad Teaching Hosp Feldkirch, Med 1, Feldkirch, Austria
[4] Acad Teaching Hosp Feldkirch, Med Cent Labs, Feldkirch, Austria
[5] Univ Hosp Bern, Swiss Cardiovasc Ctr, Div Angiol, Bern, Switzerland
[6] Drexel Univ, Coll Med, Philadelphia, PA 19104 USA