[1] VIVIT, Feldkirch, Austria
[2] Private Univ Principal Liechtenstein, Triesen, Liechtenstein
[3] Med Cent Labs, Feldkirch, Austria
[4] Acad Teaching Hosp Feldkirch, Dept Med 1, Feldkirch, Austria
[5] Swiss Cardiovasc Ctr, Div Angiol, Bern, Switzerland
[6] Drexel Univ, Coll Med, Philadelphia, PA 19104 USA