[1] Univ Helsinki, Dept Vasc Surg, Helsinki, Finland
[2] Helsinki Univ Hosp, Helsinki, Finland
[3] Uppsala Univ, Dept Surg Sci, Sect Vasc Surg, Uppsala, Sweden
[4] Univ Bern, Bern Univ Hosp, Inselspital, Dept Cardiovasc Surg, Bern, Switzerland
[5] Aarhus Univ Hosp, Dept Cardiothorac & Vasc Surg, Aarhus, Denmark
[6] Nancy Univ Hosp, Dept Vasc Surg, Nancy, France
[7] Univ Siena, Dept Med Surg & Neurosci, Siena, Italy