[1] Oregon Hlth & Sci Univ, Dotter Intervent Inst, Portland, OR 97239 USA
[2] Univ Calif San Diego, Dept Radiol, Med Ctr, San Diego, CA 92103 USA
[3] Carolinas Med Ctr, Dept Surg, Charlotte, NC 28203 USA
[4] Johns Hopkins Univ, Dept Med, Baltimore, MD USA
[5] Univ Michigan, Med Ctr, Dept Surg, Ann Arbor, MI 48109 USA
[6] Univ Virginia, Dept Med, Charlottesville, VA USA
[7] Lehigh Valley Hosp Ctr, Dept Surg, Allentown, PA USA
[8] Reading Hosp, Dept Radiol, W Reading, PA USA
[9] Jobst Vasc Ctr, Toledo, OH USA
[10] Univ Vermont, Dept Surg, Burlington, VT USA
[11] George Washington Univ, Med Ctr, Dept Radiol, Washington, DC 20037 USA
[12] Peterborough Reg Hlth Ctr, Dept Radiol, Omemee, ON, Canada