[1] Beth Israel Deaconess Med Ctr, Dept Surg, Boston, MA 02215 USA
[2] Univ Calif Irvine, Irvine Med Ctr, Gastrointestinal Oncol Program, Orange, CA 92668 USA
[3] Johns Hopkins Univ, Sch Med, Russell H Morgan Dept Radiol & Radiol Sci, Baltimore, MD USA
[4] Johns Hopkins Univ, Sch Med, Dept Surg, Baltimore, MD 21205 USA
[5] Virginia Mason Clin, Dept Gen Vasc & Thorac Surg, Seattle, WA 98101 USA
[6] Washington Univ, Sch Med, Dept Surg, St Louis, MO 63110 USA