1 Department of Vascular and Endovascular Surgery, Athens Medical Centre, Athens, Greece. Electronic address: liapis@med.uoa.gr.
2 Division of Vascular Surgery, University of Pittsburgh Medical Centre, Pittsburgh, PA, USA.
3 Department for Vascular and Endovascular Surgery and Munich Aortic Centre (MAC), Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.