[1] Hosp Univ Penn, Dept Radiol, Philadelphia, PA USA
[2] Univ Tubingen, Dept Diagnost & Intervent Radiol, Tubingen, Germany
[3] Univ Tubingen, Dept Diagnost & Intervent Neuroradiol, Tubingen, Germany
[4] AHEPA Univ Hosp Thessaloniki, Dept Clin Radiol, Thessaloniki, Greece
[5] Evangelismos Med Ctr, Dept Radiol, Athens, Greece
[6] Cleveland Clin Fdn, Dept Vasc Surg, Cleveland, OH USA
[7] Cleveland Clin, Div Intervent Radiol, Imaging Inst, Cleveland, OH USA
[8] Cleveland Clin Main Campus, Imaging Inst, Sect Intervent Radiol, 9500 Euclid Ave, Cleveland, OH 44195 USA