[1] Hosp Univ Penn, Div Intervent Radiol, Dept Radiol, 3400 Spruce St, Philadelphia, PA 19104 USA
[2] Univ San Diego, Med Ctr, Div Intervent Radiol, Dept Radiol, San Diego, CA 92110 USA
[3] Univ Wisconsin, Sch Med, Div Intervent Radiol, Dept Radiol, Madison, WI USA
[4] H Lee Moffitt Canc Ctr & Res Inst, Div Intervent Radiol, Dept Radiol, Tampa, FL USA
[5] Univ San Francisco, Med Ctr, Div Intervent Radiol, Dept Radiol, San Francisco, CA 94117 USA
[6] Mem Sloan Kettering Canc Ctr, Div Intervent Radiol, Dept Radiol, 1275 York Ave, New York, NY 10021 USA
[7] Stanford Univ, Med Ctr, Div Intervent Radiol, Dept Radiol, Stanford, CA 94305 USA
[8] NW Mem Hosp, Div Intervent Radiol, Dept Radiol, Chicago, IL 60611 USA
[9] Hosp Univ Penn, Div Gastroenterol, Dept Med, 3400 Spruce St, Philadelphia, PA 19104 USA