[1] Univ Calif San Diego, Dept Radiol, Div Vasc & Intervent Radiol, San Diego Hlth Sci, San Diego, CA 92103 USA
[2] Univ Calif San Diego, Dept Med, Div Gastroenterol, San Diego Hlth Sci, San Diego, CA 92103 USA
[3] Univ Calif San Diego, Dept Surg, Div Transplant Surg, San Diego Hlth Sci, San Diego, CA 92103 USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Radiol, Sect Intervent Radiol, Houston, TX 77030 USA