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