[1] NCI, NIH, Bethesda, MD 20892 USA
[2] NCI, Dev Therapeut Branch, Ctr Canc Res, NIH, Bethesda, MD 20892 USA
[3] NIH, Bethesda, MD 20892 USA
[4] NCI, Biostat & Data Management Sect, Ctr Canc Res, Bethesda, MD 20892 USA
[5] NCI, Lab Tumor Immunol & Biol, NIH, Bethesda, MD 20892 USA
[6] NCI, Urol Oncol Branch, Bethesda, MD 20892 USA