[1] Univ Hosp Bern, Dept Cardiovasc Surg, CH-3010 Bern, Switzerland
[2] Hosp Hietzing, Dept Cardiovasc Surg, Vienna, Austria
[3] Clin San Carlos Univ Hosp, Madrid, Spain
[4] Zayed Mil Hosp, Dept Cardiovasc Surg, Abu Dhabi, U Arab Emirates
[5] NHS Fdn Trust, Univ Hosp Birmingham, Dept Cardiothorac Surg, Birmingham, W Midlands, England
[6] Cardioangiol Ctr Bethanien, Frankfurt, Germany
[7] Hosp Gen Univ Vall dHebron, Barcelona, Spain
[8] Univ Hosp S Orsola, Bologna, Italy
[9] Univ Hosp Essen, Dept Thorac & Cardiovasc Surg, W German Heart Ctr Essen, Essen, Germany
[10] Rigshosp, Dept Intervent Radiol, DK-2100 Copenhagen, Denmark
[11] Univ Rostock, Heart Ctr Rostock, Rostock, Germany
[12] Univ Bologna, Dept Cardiol, Bologna, Italy
[13] Hop Rangueil, Dept Radiol, Toulouse, France
[14] NHS Trust, St Georges Vasc Inst, Dept Vasc Surg, London, England
[15] Johannes Gutenberg Univ Mainz, Med Ctr, Dept Cardiothorac & Vasc Surg, Mainz, Germany
[16] Univ Duisburg Essen, Dept Cardiol, W German Heart Ctr Essen, Essen, Germany