[1] Red Cross Hosp, Dept Vasc Surg, 24 Alex Papagou St, Athens 14122, Greece
[2] Univ Med Ctr Ljubljana, Dept Vasc Dis, Ljubljana, Slovenia
[3] Med Univ Silesia, Fac Med Sci Zabrze, Dept Internal Med Angiol & Phys Med, Bytom, Poland
[4] Med Univ Silesia, Clin Internal Med Angiol & Phys Med, Fac Med Sci Zabrze, Bytom, Poland
[5] Univ Ljubljana, Fac Med, Dept Internal Med, Ljubljana, Slovenia
[6] Nicolaus Copernicus Univ Torun, Dept Vasc Surg & Angiol, L Rydygier Coll Med Bydgoszcz, Torun, Poland
[7] Nuova Villa Claudia, Vasc Ctr, Rome, Italy
[8] Univ Porto, Hosp S Joao, Dept Angiol & Vasc Surg, Porto, Portugal
[9] Univ Coll London UCL, Univ Coll London Med Sch, Dept Surg Biotechnol, Div Surg & Intervent Sci, London, England
[10] Univ Coll London UCL, Royal Free Hosp Campus, Dept Clin Biochem, London, England