1 Department of Vascular Surgery, University Hospital of Patras, Patras, Greece. Electronic address: kakkos@upatras.gr.
2 Department of Vascular and Endovascular Surgery, Manchester University NHS Foundation Trust, and Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.
3 Department of Vascular Surgery, University of Bristol, Bristol, UK.