[1] Duke University Medical Center,Department of Pharmacology and Cancer Biology, Department of Radiation Oncology
[2] Lineberger Comprehensive Cancer Center,Department of Pharmacology and Radiation Oncology
[3] University of North Carolina at Chapel Hill,undefined
[4] Present address: Medical Oncology Branch,undefined
[5] National Cancer Institute,undefined
[6] National Institutes of Health,undefined
[7] Bethesda,undefined
[8] Maryland 20892,undefined
[9] USA,undefined