1. Medical School, University of Cyprus, 2029 Nicosia, Cyprus
2. Vascular Surgery Department, Patras University Hospital, University of Patras, Rio, 265 04 Patra, Greece
3. Department of Vascular Surgery, Medical School, National and Kapodistrian University of Athens, Attikon University Hospital, 115 27 Athens, Greece
4. 2nd Department of Pathology, National and Kapodistrian University of Athens, 115 27 Athens, Greece
5. Department of Vascular and Endovascular Surgery, University Hospital of Cologne, 50937 Cologne, Germany
6. Department of Vascular and Endovascular Surgery, Athens Medical Center, 106 73 Athens, Greece