1 From the Department of Interventional Radiology, Royal Marsden NHS Foundation Trust, 203 Fulham Road, London SW3 6JJ, UK (E.W.J.); Institute of Cancer Research, London, United Kingdom (E.W.J.); Hadassah Hebrew University Medical Center, Jerusalem, Israel (S.N.G.); and Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass (S.N.G.).