[1] G Mazzini Hosp, Div Cardiac Surg, Teramo, Italy
[2] Univ Michigan Hlth Syst, Cardiac Surg, Ann Arbor, MI USA
[3] Univ Pittsburgh, Div Cardiothorac Surg, Pittsburgh, PA USA
[4] Massachusetts Gen Hosp, Thorac Aort Ctr, Boston, MA 02114 USA
[5] Univ Tromso Hosp, Dept Thorac & Cardiovasc Surg, Tromso, Norway
[6] Univ Penn, Sch Med, Div Cardiovasc Surg, Philadelphia, PA 19104 USA
[7] Hadassah Hebrew Univ Med Ctr, Dept Cardiothorac Surg, Jerusalem, Israel
[8] Univ Hosp San Giovanni di Dio & Ruggi dAragona, Dept Cardiol & Cardiac Surg, Salerno, Italy
[9] Cedars Sinai Med Ctr, Div Cardiothorac Surg, Los Angeles, CA 90048 USA
[10] Univ Michigan Hlth Syst, Cardiovasc Ctr, Ann Arbor, MI USA
[11] Univ Bologna, S Orsola Malpighi Hosp, Dept Cardiac Surg, I-40126 Bologna, Italy
[12] San Salvatore Hosp, Intervent Cardiol Unit, Pesaro, Italy
[13] Royal Brompton & Harefield NHS Trust, Cardiol & Aort Ctr, London, England
[14] IRCCS Policlin San Donato, Thorac Aort Res Ctr, San Donato Milanese, Italy