1. Department of Vascular Surgery; ‘Demokritus’ University of Thrace; University General Hospital of Alexandroupolis; Alexandroupolis; Greece
2. Section of Vascular Surgery; ‘Georgios Papanikolaou’ General Hospital; Thessaloniki; Greece
3. Department of Vascular and Endovascular Surgery; Manchester Royal Infirmary; Central Manchester University Hospitals NHS Foundation Trust; Manchester; UK