[1] NIH, Dept Radiol & Imaging Sci, Ctr Clin, Ctr Intervent Oncol, Bethesda, MD 20892 USA
[2] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Sect Med Neuroendocrinol, Bethesda, MD USA
[3] NCI, Expt Therapeut Sect, Med Oncol Branch, Bethesda, MD 20892 USA