1 Vorarlberg Institute for Vascular Investigation & Treatment (VIVIT), Feldkirch, Austria; Vorarlberger Landeskrankenhausbetriebsgesellschaft, Feldkirch, Austria; Private University in the Principality of Liechtenstein, Triesen, FL, Liechtenstein; Drexel University College of Medicine, Philadelphia, USA. Electronic address: heinz.drexel@vivit.at.
2 Vorarlberg Institute for Vascular Investigation & Treatment (VIVIT), Feldkirch, Austria; Private University in the Principality of Liechtenstein, Triesen, FL, Liechtenstein.