[1] Oregon Hlth & Sci Univ, Dotter Intervent Inst, Portland, OR 97239 USA
[2] Univ Penn, Med Ctr, Dept Radiol, Div Intervent Radiol, Philadelphia, PA 19104 USA
[3] Sir Mortimer B Davis Jewish Hosp, Ctr Clin Epidemiol & Community Studies, Montreal, PQ, Canada
[4] Sir Mortimer B Davis Jewish Hosp, Thrombosis Clin, Montreal, PQ, Canada
[5] Columbia Presbyterian Med Ctr, Dept Vasc & Intervent Radiol, New York, NY 10032 USA
[6] Univ Calif Los Angeles, Med Ctr, Dept Radiol, Los Angeles, CA 90024 USA
[7] Sunnybrook Hlth Sci Ctr, Thromboembolism Program, Toronto, ON M4N 3M5, Canada
[8] Henderson Res Ctr, Hamilton, ON, Canada
[9] McMaster Univ, Clin Thrombosis Serv, Hamilton, ON, Canada
[10] Univ Vermont, Coll Med, Dept Surg, Burlington, VT USA
[11] Univ Michigan, Ctr Cardiovasc, Dept Surg, Vasc Surg Sect, Ann Arbor, MI 48109 USA
[12] Walter Reed Army Med Ctr, Dept Surg, Washington, DC 20307 USA
[13] Walter Reed Army Med Ctr, Peripheral Vasc Surg Serv, Washington, DC 20307 USA
[14] George Washington Univ, Med Ctr, Dept Radiol, Washington, DC 20037 USA
[15] Washington Univ, Sch Med, Mallinckrodt Inst Radiol, St Louis, MO USA
[16] Johns Hopkins Univ, Dept Med, Baltimore, MD USA